18815308356 has 48 divisors (see below), whose sum is σ = 47294172800. Its totient is φ = 5787528192.

The previous prime is 18815308333. The next prime is 18815308357. The reversal of 18815308356 is 65380351881.

It is not an unprimeable number, because it can be changed into a prime (18815308357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538260 + ... + 572148.

Almost surely, 2^18815308356 is an apocalyptic number.

It is an amenable number.

18815308356 is an abundant number, since it is smaller than the sum of its proper divisors (28478864444).

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

18815308356 is a wasteful number, since it uses less digits than its factorization.

18815308356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37468 (or 37466 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 18815308356 in words is "eighteen billion, eight hundred fifteen million, three hundred eight thousand, three hundred fifty-six".