18900725 has 12 divisors (see below), whose sum is σ = 24671040. Its totient is φ = 14324400.

The previous prime is 18900703. The next prime is 18900737. The reversal of 18900725 is 52700981.

It is not a de Polignac number, because 18900725 - 2¹⁰ = 18899701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18900691 and 18900700.

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, 19421 + ... + 20370.

It is an arithmetic number, because the mean of its divisors is an integer number (2055920).

Almost surely, 2^18900725 is an apocalyptic number.

It is an amenable number.

18900725 is a deficient number, since it is larger than the sum of its proper divisors (5770315).

18900725 is a wasteful number, since it uses less digits than its factorization.

18900725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39820 (or 39815 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 18900725 is about 4347.4964059790. The cubic root of 18900725 is about 266.3746064602.

The spelling of 18900725 in words is "eighteen million, nine hundred thousand, seven hundred twenty-five".