18212176864 has 48 divisors (see below), whose sum is σ = 41029214688. Its totient is φ = 7795348992.

The previous prime is 18212176859. The next prime is 18212176909. The reversal of 18212176864 is 46867121281.

It is a super-2 number, since 2×18212176864² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 127522 + ... + 229534.

It is an arithmetic number, because the mean of its divisors is an integer number (854775306).

Almost surely, 2^18212176864 is an apocalyptic number.

18212176864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18212176864 is an abundant number, since it is smaller than the sum of its proper divisors (22817037824).

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

18212176864 is a wasteful number, since it uses less digits than its factorization.

18212176864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102827 (or 102819 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The spelling of 18212176864 in words is "eighteen billion, two hundred twelve million, one hundred seventy-six thousand, eight hundred sixty-four".