18881612 has 6 divisors (see below), whose sum is σ = 33042828. Its totient is φ = 9440804.

The previous prime is 18881591. The next prime is 18881623. The reversal of 18881612 is 21618881.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360198 + ... + 2360205.

It is an arithmetic number, because the mean of its divisors is an integer number (5507138).

Almost surely, 2^18881612 is an apocalyptic number.

It is an amenable number.

18881612 is a deficient number, since it is larger than the sum of its proper divisors (14161216).

18881612 is a wasteful number, since it uses less digits than its factorization.

18881612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720407 (or 4720405 counting only the distinct ones).

The product of its digits is 6144, while the sum is 35.

The square root of 18881612 is about 4345.2976883063. The cubic root of 18881612 is about 266.2847874197.

The spelling of 18881612 in words is "eighteen million, eight hundred eighty-one thousand, six hundred twelve".