| Base | Representation |
|---|---|
| bin | 1001110100110011000111… |
| … | …01001001010001101111100 |
| 3 | 2211111110012111022121202210 |
| 4 | 10322121203221022031330 |
| 5 | 10312440232422424040 |
| 6 | 113541210351020420 |
| 7 | 4356635615244051 |
| oct | 472314351121574 |
| 9 | 84443174277683 |
| 10 | 21605357233020 |
| 11 | 697a8649a8a30 |
| 12 | 250b31a50a710 |
| 13 | c094b8084b32 |
| 14 | 5499c223b028 |
| 15 | 277011938480 |
| hex | 13a663a4a37c |
21605357233020 has 384 divisors, whose sum is σ = 68577860736000. Its totient is φ = 5034317783040.
The previous prime is 21605357233003. The next prime is 21605357233037. The reversal of 21605357233020 is 2033275350612.
It is an interprime number because it is at equal distance from previous prime (21605357233003) and next prime (21605357233037).
It is a super-2 number, since 2×216053572330202 (a number of 27 digits) contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 21605357233020.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4419174736 + ... + 4419179624.
It is an arithmetic number, because the mean of its divisors is an integer number (178588179000).
Almost surely, 221605357233020 is an apocalyptic number.
21605357233020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21605357233020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34288930368000).
21605357233020 is an abundant number, since it is smaller than the sum of its proper divisors (46972503502980).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21605357233020 is a wasteful number, since it uses less digits than its factorization.
21605357233020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5933 (or 5931 counting only the distinct ones).
The product of its (nonzero) digits is 226800, while the sum is 39.
The spelling of 21605357233020 in words is "twenty-one trillion, six hundred five billion, three hundred fifty-seven million, two hundred thirty-three thousand, twenty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.070 sec. • engine limits •