18797664 has 24 divisors (see below), whose sum is σ = 49344120. Its totient is φ = 6265856.

The previous prime is 18797659. The next prime is 18797711. The reversal of 18797664 is 46679781.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97809 + ... + 98000.

It is an arithmetic number, because the mean of its divisors is an integer number (2056005).

Almost surely, 2^18797664 is an apocalyptic number.

It is an amenable number.

18797664 is an abundant number, since it is smaller than the sum of its proper divisors (30546456).

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

18797664 is a wasteful number, since it uses less digits than its factorization.

18797664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195822 (or 195814 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 18797664 is about 4335.6272902545. The cubic root of 18797664 is about 265.8895654036.

The spelling of 18797664 in words is "eighteen million, seven hundred ninety-seven thousand, six hundred sixty-four".