18975872 has 16 divisors (see below), whose sum is σ = 37803750. Its totient is φ = 9487872.

The previous prime is 18975871. The next prime is 18975881. The reversal of 18975872 is 27857981.

It can be written as a sum of positive squares in only one way, i.e., 17774656 + 1201216 = 4216^2 + 1096^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (18975871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73997 + ... + 74252.

Almost surely, 2^18975872 is an apocalyptic number.

It is an amenable number.

18975872 is a deficient number, since it is larger than the sum of its proper divisors (18827878).

18975872 is an equidigital number, since it uses as much as digits as its factorization.

18975872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148263 (or 148251 counting only the distinct ones).

The product of its digits is 282240, while the sum is 47.

The square root of 18975872 is about 4356.1303929061. The cubic root of 18975872 is about 266.7271640520.

The spelling of 18975872 in words is "eighteen million, nine hundred seventy-five thousand, eight hundred seventy-two".