20959990252704 has 72 divisors (see below), whose sum is σ = 61660316177460. Its totient is φ = 6745743986688.

The previous prime is 20959990252657. The next prime is 20959990252711. The reversal of 20959990252704 is 40725209995902.

20959990252704 is a `hidden beast` number, since 209 + 5 + 99 + 90 + 252 + 7 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20944352250000 + 15638002704 = 4576500^2 + 125052^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254780337 + ... + 1254797040.

Almost surely, 2^{20959990252704} is an apocalyptic number.

20959990252704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20959990252704 is an abundant number, since it is smaller than the sum of its proper divisors (40700325924756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20959990252704 is a wasteful number, since it uses less digits than its factorization.

20959990252704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509577422 (or 2509577411 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 63.

The spelling of 20959990252704 in words is "twenty trillion, nine hundred fifty-nine billion, nine hundred ninety million, two hundred fifty-two thousand, seven hundred four".