18649956 has 24 divisors (see below), whose sum is σ = 46864384. Its totient is φ = 5738400.

The previous prime is 18649937. The next prime is 18649973. The reversal of 18649956 is 65994681.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59620 + ... + 59931.

Almost surely, 2^18649956 is an apocalyptic number.

It is an amenable number.

18649956 is an abundant number, since it is smaller than the sum of its proper divisors (28214428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18649956 is a wasteful number, since it uses less digits than its factorization.

18649956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119571 (or 119569 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 18649956 is about 4318.5594820495. The cubic root of 18649956 is about 265.1912989190.

The spelling of 18649956 in words is "eighteen million, six hundred forty-nine thousand, nine hundred fifty-six".