18439025 has 24 divisors (see below), whose sum is σ = 26263200. Its totient is φ = 12700800.

The previous prime is 18439009. The next prime is 18439039. The reversal of 18439025 is 52093481.

It is not a de Polignac number, because 18439025 - 2⁴ = 18439009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18438982 and 18439000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3461 + ... + 6989.

It is an arithmetic number, because the mean of its divisors is an integer number (1094300).

Almost surely, 2^18439025 is an apocalyptic number.

It is an amenable number.

18439025 is a deficient number, since it is larger than the sum of its proper divisors (7824175).

18439025 is a wasteful number, since it uses less digits than its factorization.

18439025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569 (or 3564 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18439025 is about 4294.0685835231. The cubic root of 18439025 is about 264.1877347331.

The spelling of 18439025 in words is "eighteen million, four hundred thirty-nine thousand, twenty-five".