18983812 has 48 divisors (see below), whose sum is σ = 36984640. Its totient is φ = 8491392.

The previous prime is 18983807. The next prime is 18983837. The reversal of 18983812 is 21838981.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120838 + ... + 120994.

Almost surely, 2^18983812 is an apocalyptic number.

It is an amenable number.

18983812 is a deficient number, since it is larger than the sum of its proper divisors (18000828).

18983812 is a wasteful number, since it uses less digits than its factorization.

18983812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 258 counting only the distinct ones).

The product of its digits is 27648, while the sum is 40.

The square root of 18983812 is about 4357.0416569044. The cubic root of 18983812 is about 266.7643607329.

The spelling of 18983812 in words is "eighteen million, nine hundred eighty-three thousand, eight hundred twelve".