18825172 has 12 divisors (see below), whose sum is σ = 33247060. Its totient is φ = 9326016.

The previous prime is 18825161. The next prime is 18825173. The reversal of 18825172 is 27152881.

It can be written as a sum of positive squares in 2 ways, for example, as 12292036 + 6533136 = 3506^2 + 2556^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18825173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21153 + ... + 22024.

Almost surely, 2^18825172 is an apocalyptic number.

It is an amenable number.

18825172 is a deficient number, since it is larger than the sum of its proper divisors (14421888).

18825172 is a wasteful number, since it uses less digits than its factorization.

18825172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43290 (or 43288 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The square root of 18825172 is about 4338.7984511844. The cubic root of 18825172 is about 266.0192007547.

The spelling of 18825172 in words is "eighteen million, eight hundred twenty-five thousand, one hundred seventy-two".