18664420576 has 12 divisors (see below), whose sum is σ = 36745578072. Its totient is φ = 9332210272.

The previous prime is 18664420487. The next prime is 18664420597. The reversal of 18664420576 is 67502446681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291631540 + ... + 291631603.

It is an arithmetic number, because the mean of its divisors is an integer number (3062131506).

Almost surely, 2^18664420576 is an apocalyptic number.

18664420576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18664420576 is a deficient number, since it is larger than the sum of its proper divisors (18081157496).

18664420576 is an equidigital number, since it uses as much as digits as its factorization.

18664420576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583263153 (or 583263145 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 18664420576 in words is "eighteen billion, six hundred sixty-four million, four hundred twenty thousand, five hundred seventy-six".