20177662102472 has 32 divisors (see below), whose sum is σ = 43254522508800. Its totient is φ = 8644234443264.

The previous prime is 20177662102459. The next prime is 20177662102529. The reversal of 20177662102472 is 27420126677102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69333272 + ... + 69623687.

It is an arithmetic number, because the mean of its divisors is an integer number (1351703828400).

Almost surely, 2^{20177662102472} is an apocalyptic number.

It is an amenable number.

20177662102472 is an abundant number, since it is smaller than the sum of its proper divisors (23076860406328).

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

20177662102472 is a wasteful number, since it uses less digits than its factorization.

20177662102472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138959565 (or 138959561 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 47.

Adding to 20177662102472 its reverse (27420126677102), we get a palindrome (47597788779574).

The spelling of 20177662102472 in words is "twenty trillion, one hundred seventy-seven billion, six hundred sixty-two million, one hundred two thousand, four hundred seventy-two".