18674338625864 has 8 divisors (see below), whose sum is σ = 35014384923510. Its totient is φ = 9337169312928.

The previous prime is 18674338625849. The next prime is 18674338625867. The reversal of 18674338625864 is 46852683347681.

It can be written as a sum of positive squares in only one way, i.e., 16154049024100 + 2520289601764 = 4019210^2 + 1587542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18674338625864² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18674338625867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1167146164109 + ... + 1167146164124.

Almost surely, 2^{18674338625864} is an apocalyptic number.

It is an amenable number.

18674338625864 is a deficient number, since it is larger than the sum of its proper divisors (16340046297646).

18674338625864 is a wasteful number, since it uses less digits than its factorization.

18674338625864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334292328239 (or 2334292328235 counting only the distinct ones).

The product of its digits is 1114767360, while the sum is 71.

The spelling of 18674338625864 in words is "eighteen trillion, six hundred seventy-four billion, three hundred thirty-eight million, six hundred twenty-five thousand, eight hundred sixty-four".