18975888 has 30 divisors (see below), whose sum is σ = 53106534. Its totient is φ = 6325248.

The previous prime is 18975881. The next prime is 18975967. The reversal of 18975888 is 88857981.

It can be written as a sum of positive squares in only one way, i.e., 18249984 + 725904 = 4272^2 + 852^2 .

It is not an unprimeable number, because it can be changed into a prime (18975881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65745 + ... + 66032.

Almost surely, 2^18975888 is an apocalyptic number.

18975888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18975888 is an abundant number, since it is smaller than the sum of its proper divisors (34130646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18975888 is a wasteful number, since it uses less digits than its factorization.

18975888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131791 (or 131782 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The square root of 18975888 is about 4356.1322293980. The cubic root of 18975888 is about 266.7272390179.

The spelling of 18975888 in words is "eighteen million, nine hundred seventy-five thousand, eight hundred eighty-eight".