18689210902404 has 81 divisors (see below), whose sum is σ = 54955713585591. Its totient is φ = 5339722666320.

The previous prime is 18689210902391. The next prime is 18689210902423. The reversal of 18689210902404 is 40420901298681.

It is a happy number.

The square root of 18689210902404 is 4323102.

It is a perfect power (a square), and thus also a powerful number.

18689210902404 is a `hidden beast` number, since 1 + 8 + 68 + 92 + 1 + 0 + 90 + 2 + 404 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 181518819 + ... + 181621749.

Almost surely, 2^{18689210902404} is an apocalyptic number.

18689210902404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18689210902404 is the 4323102-nd square number.

It is an amenable number.

18689210902404 is an abundant number, since it is smaller than the sum of its proper divisors (36266502683187).

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

18689210902404 is an frugal number, since it uses more digits than its factorization.

18689210902404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205886 (or 102943 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 18689210902404 in words is "eighteen trillion, six hundred eighty-nine billion, two hundred ten million, nine hundred two thousand, four hundred four".