18850864356 has 36 divisors (see below), whose sum is σ = 47655064912. Its totient is φ = 6283058544.

The previous prime is 18850864327. The next prime is 18850864367. The reversal of 18850864356 is 65346805881.

18850864356 is a `hidden beast` number, since 1 + 88 + 50 + 86 + 435 + 6 = 666.

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

It is a super-2 number, since 2×18850864356² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 644751 + ... + 673353.

Almost surely, 2^18850864356 is an apocalyptic number.

It is an amenable number.

18850864356 is an abundant number, since it is smaller than the sum of its proper divisors (28804200556).

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

18850864356 is a wasteful number, since it uses less digits than its factorization.

18850864356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46920 (or 46915 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 18850864356 in words is "eighteen billion, eight hundred fifty million, eight hundred sixty-four thousand, three hundred fifty-six".