18666610944 has 36 divisors (see below), whose sum is σ = 49680409296. Its totient is φ = 6222203392.

The previous prime is 18666610939. The next prime is 18666610967. The reversal of 18666610944 is 44901666681.

It is a super-2 number, since 2×18666610944² (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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12151974 + ... + 12153509.

Almost surely, 2^18666610944 is an apocalyptic number.

It is an amenable number.

18666610944 is an abundant number, since it is smaller than the sum of its proper divisors (31013798352).

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

18666610944 is an equidigital number, since it uses as much as digits as its factorization.

18666610944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24305502 (or 24305488 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 18666610944 in words is "eighteen billion, six hundred sixty-six million, six hundred ten thousand, nine hundred forty-four".