18805925 has 12 divisors (see below), whose sum is σ = 23411076. Its totient is φ = 14985600.

The previous prime is 18805907. The next prime is 18805939. The reversal of 18805925 is 52950881.

It can be written as a sum of positive squares in 6 ways, for example, as 2540836 + 16265089 = 1594^2 + 4033^2 .

It is not a de Polignac number, because 18805925 - 2⁶ = 18805861 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5687 + ... + 8363.

It is an arithmetic number, because the mean of its divisors is an integer number (1950923).

Almost surely, 2^18805925 is an apocalyptic number.

It is an amenable number.

18805925 is a deficient number, since it is larger than the sum of its proper divisors (4605151).

18805925 is a wasteful number, since it uses less digits than its factorization.

18805925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 18805925 is about 4336.5798735870. The cubic root of 18805925 is about 265.9285098174.

The spelling of 18805925 in words is "eighteen million, eight hundred five thousand, nine hundred twenty-five".