18775372 has 48 divisors (see below), whose sum is σ = 41868288. Its totient is φ = 7153920.

The previous prime is 18775369. The next prime is 18775387. The reversal of 18775372 is 27357781.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13828 + ... + 15124.

It is an arithmetic number, because the mean of its divisors is an integer number (872256).

Almost surely, 2^18775372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18775372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20934144).

18775372 is an abundant number, since it is smaller than the sum of its proper divisors (23092916).

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

18775372 is a wasteful number, since it uses less digits than its factorization.

18775372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 1364 counting only the distinct ones).

The product of its digits is 82320, while the sum is 40.

The square root of 18775372 is about 4333.0557346981. The cubic root of 18775372 is about 265.7844183891.

The spelling of 18775372 in words is "eighteen million, seven hundred seventy-five thousand, three hundred seventy-two".