| Base | Representation |
|---|---|
| bin | 1101111110000111011110… |
| … | …10001010001100100000000 |
| 3 | 11000202221212112202110110000 |
| 4 | 12333003233101101210000 |
| 5 | 13011320334304242000 |
| 6 | 145201152332240000 |
| 7 | 6320364251425230 |
| oct | 677035721214400 |
| 9 | 130687775673400 |
| 10 | 30721620384000 |
| 11 | 9874a698831a7 |
| 12 | 3542080610000 |
| 13 | 141b061ba5a00 |
| 14 | 782d11c55cc0 |
| 15 | 384216ec6000 |
| hex | 1bf0ef451900 |
30721620384000 has 4320 divisors, whose sum is σ = 145391989526784. Its totient is φ = 6304009420800.
The previous prime is 30721620383939. The next prime is 30721620384001. The reversal of 30721620384000 is 48302612703.
It is a happy number.
30721620384000 is a `hidden beast` number, since 3 + 0 + 7 + 21 + 620 + 3 + 8 + 4 + 0 + 0 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (4320).
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30721620384001) by changing a digit.
It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 131852447884 + ... + 131852448116.
Almost surely, 230721620384000 is an apocalyptic number.
30721620384000 is a gapful number since it is divisible by the number (30) 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 30721620384000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72695994763392).
30721620384000 is an abundant number, since it is smaller than the sum of its proper divisors (114670369142784).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
30721620384000 is a wasteful number, since it uses less digits than its factorization.
30721620384000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 352 (or 306 counting only the distinct ones).
The product of its (nonzero) digits is 48384, while the sum is 36.
Adding to 30721620384000 its reverse (48302612703), we get a palindrome (30769922996703).
The spelling of 30721620384000 in words is "thirty trillion, seven hundred twenty-one billion, six hundred twenty million, three hundred eighty-four thousand".
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