18859472 has 10 divisors (see below), whose sum is σ = 36540258. Its totient is φ = 9429728.

The previous prime is 18859469. The next prime is 18859487. The reversal of 18859472 is 27495881.

It can be written as a sum of positive squares in only one way, i.e., 17106496 + 1752976 = 4136^2 + 1324^2 .

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, 589343 + ... + 589374.

Almost surely, 2^18859472 is an apocalyptic number.

It is an amenable number.

18859472 is a deficient number, since it is larger than the sum of its proper divisors (17680786).

18859472 is a wasteful number, since it uses less digits than its factorization.

18859472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178725 (or 1178719 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The square root of 18859472 is about 4342.7493595647. The cubic root of 18859472 is about 266.1806675842.

The spelling of 18859472 in words is "eighteen million, eight hundred fifty-nine thousand, four hundred seventy-two".