18720512 has 18 divisors (see below), whose sum is σ = 37368408. Its totient is φ = 9360128.

The previous prime is 18720467. The next prime is 18720539. The reversal of 18720512 is 21502781.

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, 36308 + ... + 36819.

Almost surely, 2^18720512 is an apocalyptic number.

It is an amenable number.

18720512 is a deficient number, since it is larger than the sum of its proper divisors (18647896).

18720512 is an frugal number, since it uses more digits than its factorization.

18720512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73143 (or 73129 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 18720512 is about 4326.7206981732. The cubic root of 18720512 is about 265.5252995517.

The spelling of 18720512 in words is "eighteen million, seven hundred twenty thousand, five hundred twelve".