18850565172554 has 4 divisors (see below), whose sum is σ = 28275847758834. Its totient is φ = 9425282586276.

The previous prime is 18850565172479. The next prime is 18850565172563. The reversal of 18850565172554 is 45527156505881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18349888640329 + 500676532225 = 4283677^2 + 707585^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4712641293137 + ... + 4712641293140.

Almost surely, 2^{18850565172554} is an apocalyptic number.

18850565172554 is a deficient number, since it is larger than the sum of its proper divisors (9425282586280).

18850565172554 is an equidigital number, since it uses as much as digits as its factorization.

18850565172554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9425282586279.

The product of its (nonzero) digits is 67200000, while the sum is 62.

The spelling of 18850565172554 in words is "eighteen trillion, eight hundred fifty billion, five hundred sixty-five million, one hundred seventy-two thousand, five hundred fifty-four".