18979672 has 8 divisors (see below), whose sum is σ = 35586900. Its totient is φ = 9489832.

The previous prime is 18979663. The next prime is 18979687. The reversal of 18979672 is 27697981.

It is a happy number.

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1186222 + ... + 1186237.

Almost surely, 2^18979672 is an apocalyptic number.

It is an amenable number.

18979672 is a deficient number, since it is larger than the sum of its proper divisors (16607228).

18979672 is a wasteful number, since it uses less digits than its factorization.

18979672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372465 (or 2372461 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The square root of 18979672 is about 4356.5665379976. The cubic root of 18979672 is about 266.7449672843.

The spelling of 18979672 in words is "eighteen million, nine hundred seventy-nine thousand, six hundred seventy-two".