18689025 has 12 divisors (see below), whose sum is σ = 30899312. Its totient is φ = 9967440.

The previous prime is 18689023. The next prime is 18689051. The reversal of 18689025 is 52098681.

It is not a de Polignac number, because 18689025 - 2¹ = 18689023 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18689023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124519 + ... + 124668.

Almost surely, 2^18689025 is an apocalyptic number.

18689025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18689025 is a deficient number, since it is larger than the sum of its proper divisors (12210287).

18689025 is a wasteful number, since it uses less digits than its factorization.

18689025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249200 (or 249195 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 18689025 is about 4323.0804989035. The cubic root of 18689025 is about 265.3763490874.

The spelling of 18689025 in words is "eighteen million, six hundred eighty-nine thousand, twenty-five".