18807572 has 18 divisors (see below), whose sum is σ = 38287242. Its totient is φ = 8060304.

The previous prime is 18807563. The next prime is 18807577. The reversal of 18807572 is 27570881.

It can be written as a sum of positive squares in only one way, i.e., 16032016 + 2775556 = 4004^2 + 1666^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18807577) 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, 47783 + ... + 48174.

It is an arithmetic number, because the mean of its divisors is an integer number (2127069).

Almost surely, 2^18807572 is an apocalyptic number.

It is an amenable number.

18807572 is an abundant number, since it is smaller than the sum of its proper divisors (19479670).

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

18807572 is a wasteful number, since it uses less digits than its factorization.

18807572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95975 (or 95966 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 18807572 is about 4336.7697656205. The cubic root of 18807572 is about 265.9362728224.

The spelling of 18807572 in words is "eighteen million, eight hundred seven thousand, five hundred seventy-two".