20572156616 has 32 divisors (see below), whose sum is σ = 43908955200. Its totient is φ = 8944415040.

The previous prime is 20572156613. The next prime is 20572156643. The reversal of 20572156616 is 61665127502.

It is not an unprimeable number, because it can be changed into a prime (20572156613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5080031 + ... + 5084078.

It is an arithmetic number, because the mean of its divisors is an integer number (1372154850).

Almost surely, 2^20572156616 is an apocalyptic number.

It is an amenable number.

20572156616 is an abundant number, since it is smaller than the sum of its proper divisors (23336798584).

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

20572156616 is a wasteful number, since it uses less digits than its factorization.

20572156616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164149 (or 10164145 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 20572156616 in words is "twenty billion, five hundred seventy-two million, one hundred fifty-six thousand, six hundred sixteen".