18985976 has 8 divisors (see below), whose sum is σ = 35598720. Its totient is φ = 9492984.

The previous prime is 18985969. The next prime is 18985987. The reversal of 18985976 is 67958981.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1186616 + ... + 1186631.

It is an arithmetic number, because the mean of its divisors is an integer number (4449840).

Almost surely, 2^18985976 is an apocalyptic number.

It is an amenable number.

18985976 is a deficient number, since it is larger than the sum of its proper divisors (16612744).

18985976 is a wasteful number, since it uses less digits than its factorization.

18985976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373253 (or 2373249 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 53.

The square root of 18985976 is about 4357.2899834645. The cubic root of 18985976 is about 266.7744966695.

The spelling of 18985976 in words is "eighteen million, nine hundred eighty-five thousand, nine hundred seventy-six".