18839925 has 96 divisors (see below), whose sum is σ = 39580800. Its totient is φ = 8709120.

The previous prime is 18839923. The next prime is 18839941. The reversal of 18839925 is 52993881.

It is a happy number.

It is not a de Polignac number, because 18839925 - 2¹ = 18839923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18839923) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 166669 + ... + 166781.

It is an arithmetic number, because the mean of its divisors is an integer number (412300).

Almost surely, 2^18839925 is an apocalyptic number.

18839925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18839925 is an abundant number, since it is smaller than the sum of its proper divisors (20740875).

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

18839925 is a wasteful number, since it uses less digits than its factorization.

18839925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 153 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 18839925 is about 4340.4982432896. The cubic root of 18839925 is about 266.0886743387.

The spelling of 18839925 in words is "eighteen million, eight hundred thirty-nine thousand, nine hundred twenty-five".