| Base | Representation |
|---|---|
| bin | 10010101001111000… |
| … | …100000010010011000 |
| 3 | 1220200221001000001000 |
| 4 | 102221320200102120 |
| 5 | 312010141443000 |
| 6 | 13111321025000 |
| 7 | 1306235311560 |
| oct | 225170402230 |
| 9 | 56627030030 |
| 10 | 20030031000 |
| 11 | 8549480831 |
| 12 | 3a70025160 |
| 13 | 1b72990a65 |
| 14 | d802a1da0 |
| 15 | 7c36ee000 |
| hex | 4a9e20498 |
20030031000 has 512 divisors, whose sum is σ = 80061696000. Its totient is φ = 4537728000.
The previous prime is 20030030987. The next prime is 20030031013. The reversal of 20030031000 is 13003002.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (20030030987) and next prime (20030031013).
It is a super-2 number, since 2×200300310002 (a number of 21 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 24758596 + ... + 24759404.
It is an arithmetic number, because the mean of its divisors is an integer number (156370500).
Almost surely, 220030031000 is an apocalyptic number.
20030031000 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 20030031000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40030848000).
20030031000 is an abundant number, since it is smaller than the sum of its proper divisors (60031665000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20030031000 is a wasteful number, since it uses less digits than its factorization.
20030031000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 977 (or 957 counting only the distinct ones).
The product of its (nonzero) digits is 18, while the sum is 9.
Adding to 20030031000 its reverse (13003002), we get a palindrome (20043034002).
The spelling of 20030031000 in words is "twenty billion, thirty million, thirty-one thousand".
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