18768972 has 12 divisors (see below), whose sum is σ = 43794296. Its totient is φ = 6256320.

The previous prime is 18768947. The next prime is 18768991. The reversal of 18768972 is 27986781.

It is a tau number, because it is divible by the number of its divisors (12).

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, 782029 + ... + 782052.

Almost surely, 2^18768972 is an apocalyptic number.

18768972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18768972 is an abundant number, since it is smaller than the sum of its proper divisors (25025324).

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

18768972 is a wasteful number, since it uses less digits than its factorization.

18768972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564088 (or 1564086 counting only the distinct ones).

The product of its digits is 338688, while the sum is 48.

The square root of 18768972 is about 4332.3171629049. The cubic root of 18768972 is about 265.7542154618.

The spelling of 18768972 in words is "eighteen million, seven hundred sixty-eight thousand, nine hundred seventy-two".