18677972 has 12 divisors (see below), whose sum is σ = 33813780. Its totient is φ = 9016896.

The previous prime is 18677959. The next prime is 18677977. The reversal of 18677972 is 27977681.

It can be written as a sum of positive squares in 2 ways, for example, as 4268356 + 14409616 = 2066^2 + 3796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18677977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80393 + ... + 80624.

It is an arithmetic number, because the mean of its divisors is an integer number (2817815).

Almost surely, 2^18677972 is an apocalyptic number.

It is an amenable number.

18677972 is a deficient number, since it is larger than the sum of its proper divisors (15135808).

18677972 is a wasteful number, since it uses less digits than its factorization.

18677972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161050 (or 161048 counting only the distinct ones).

The product of its digits is 296352, while the sum is 47.

The square root of 18677972 is about 4321.8019390065. The cubic root of 18677972 is about 265.3240227760.

The spelling of 18677972 in words is "eighteen million, six hundred seventy-seven thousand, nine hundred seventy-two".