18930625 has 20 divisors (see below), whose sum is σ = 27041344. Its totient is φ = 12978000.

The previous prime is 18930623. The next prime is 18930641. The reversal of 18930625 is 52603981.

It is not a de Polignac number, because 18930625 - 2¹ = 18930623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18930623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2212 + ... + 6538.

Almost surely, 2^18930625 is an apocalyptic number.

It is an amenable number.

18930625 is a deficient number, since it is larger than the sum of its proper divisors (8110719).

18930625 is an frugal number, since it uses more digits than its factorization.

18930625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354 (or 4339 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 18930625 is about 4350.9338078164. The cubic root of 18930625 is about 266.5149962169.

The spelling of 18930625 in words is "eighteen million, nine hundred thirty thousand, six hundred twenty-five".