18892669638 has 16 divisors (see below), whose sum is σ = 37822432320. Its totient is φ = 6291374376.

The previous prime is 18892669613. The next prime is 18892669657. The reversal of 18892669638 is 83696629881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1538920 + ... + 1551147.

It is an arithmetic number, because the mean of its divisors is an integer number (2363902020).

Almost surely, 2^18892669638 is an apocalyptic number.

18892669638 is an abundant number, since it is smaller than the sum of its proper divisors (18929762682).

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

18892669638 is a wasteful number, since it uses less digits than its factorization.

18892669638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091091.

The product of its digits is 53747712, while the sum is 66.

The spelling of 18892669638 in words is "eighteen billion, eight hundred ninety-two million, six hundred sixty-nine thousand, six hundred thirty-eight".