18666862144 has 56 divisors (see below), whose sum is σ = 42722271680. Its totient is φ = 7926667776.

The previous prime is 18666862141. The next prime is 18666862157. The reversal of 18666862144 is 44126866681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 18666862091 and 18666862100.

It is not an unprimeable number, because it can be changed into a prime (18666862141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142302 + ... + 239965.

Almost surely, 2^18666862144 is an apocalyptic number.

18666862144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18666862144 is an abundant number, since it is smaller than the sum of its proper divisors (24055409536).

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

18666862144 is a wasteful number, since it uses less digits than its factorization.

18666862144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382395 (or 382385 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 52.

The spelling of 18666862144 in words is "eighteen billion, six hundred sixty-six million, eight hundred sixty-two thousand, one hundred forty-four".