20566712634 has 32 divisors (see below), whose sum is σ = 44304912960. Its totient is φ = 6327165312.

The previous prime is 20566712581. The next prime is 20566712641. The reversal of 20566712634 is 43621766502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541437 + ... + 578175.

It is an arithmetic number, because the mean of its divisors is an integer number (1384528530).

Almost surely, 2^20566712634 is an apocalyptic number.

20566712634 is an abundant number, since it is smaller than the sum of its proper divisors (23738200326).

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

20566712634 is a wasteful number, since it uses less digits than its factorization.

20566712634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43934.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 20566712634 in words is "twenty billion, five hundred sixty-six million, seven hundred twelve thousand, six hundred thirty-four".