18639022961268 has 36 divisors (see below), whose sum is σ = 47115559851360. Its totient is φ = 6212974448016.

The previous prime is 18639022961201. The next prime is 18639022961303. The reversal of 18639022961268 is 86216922093681.

18639022961268 is a `hidden beast` number, since 1 + 8 + 6 + 3 + 9 + 0 + 2 + 2 + 9 + 612 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5983113 + ... + 8548431.

Almost surely, 2^{18639022961268} is an apocalyptic number.

18639022961268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18639022961268 is an abundant number, since it is smaller than the sum of its proper divisors (28476536890092).

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

18639022961268 is a wasteful number, since it uses less digits than its factorization.

18639022961268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767156 (or 2767151 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 18639022961268 in words is "eighteen trillion, six hundred thirty-nine billion, twenty-two million, nine hundred sixty-one thousand, two hundred sixty-eight".