18631612 has 12 divisors (see below), whose sum is σ = 32746896. Its totient is φ = 9275360.

The previous prime is 18631603. The next prime is 18631631. The reversal of 18631612 is 21613681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9064 + ... + 10927.

It is an arithmetic number, because the mean of its divisors is an integer number (2728908).

Almost surely, 2^18631612 is an apocalyptic number.

It is an amenable number.

18631612 is a deficient number, since it is larger than the sum of its proper divisors (14115284).

18631612 is a wasteful number, since it uses less digits than its factorization.

18631612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20228 (or 20226 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 18631612 is about 4316.4351031841. The cubic root of 18631612 is about 265.1043234678.

The spelling of 18631612 in words is "eighteen million, six hundred thirty-one thousand, six hundred twelve".