20071902331656 has 96 divisors (see below), whose sum is σ = 64131423782400. Its totient is φ = 5549834741760.

The previous prime is 20071902331633. The next prime is 20071902331693. The reversal of 20071902331656 is 65613320917002.

20071902331656 is a `hidden beast` number, since 200 + 71 + 90 + 233 + 1 + 65 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 642326361 + ... + 642357608.

It is an arithmetic number, because the mean of its divisors is an integer number (668035664400).

Almost surely, 2^{20071902331656} is an apocalyptic number.

It is an amenable number.

20071902331656 is an abundant number, since it is smaller than the sum of its proper divisors (44059521450744).

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

20071902331656 is a wasteful number, since it uses less digits than its factorization.

20071902331656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284684019 (or 1284684012 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 20071902331656 in words is "twenty trillion, seventy-one billion, nine hundred two million, three hundred thirty-one thousand, six hundred fifty-six".