18724492 has 12 divisors (see below), whose sum is σ = 33106360. Its totient is φ = 9265536.

The previous prime is 18724483. The next prime is 18724513. The reversal of 18724492 is 29442781.

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, 23742 + ... + 24517.

Almost surely, 2^18724492 is an apocalyptic number.

It is an amenable number.

18724492 is a deficient number, since it is larger than the sum of its proper divisors (14381868).

18724492 is a wasteful number, since it uses less digits than its factorization.

18724492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48360 (or 48358 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 18724492 is about 4327.1806063533. The cubic root of 18724492 is about 265.5441152018.

The spelling of 18724492 in words is "eighteen million, seven hundred twenty-four thousand, four hundred ninety-two".