18649936554 has 24 divisors (see below), whose sum is σ = 37864951488. Its totient is φ = 6123850920.

The previous prime is 18649936549. The next prime is 18649936579. The reversal of 18649936554 is 45563994681.

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, 319282 + ... + 373149.

It is an arithmetic number, because the mean of its divisors is an integer number (1577706312).

Almost surely, 2^18649936554 is an apocalyptic number.

18649936554 is an abundant number, since it is smaller than the sum of its proper divisors (19215014934).

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

18649936554 is an equidigital number, since it uses as much as digits as its factorization.

18649936554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692570 (or 692503 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 60.

The spelling of 18649936554 in words is "eighteen billion, six hundred forty-nine million, nine hundred thirty-six thousand, five hundred fifty-four".