18413925 has 12 divisors (see below), whose sum is σ = 30444480. Its totient is φ = 9820720.

The previous prime is 18413911. The next prime is 18413929. The reversal of 18413925 is 52931481.

It is not a de Polignac number, because 18413925 - 2⁵ = 18413893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18413929) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 122685 + ... + 122834.

It is an arithmetic number, because the mean of its divisors is an integer number (2537040).

Almost surely, 2^18413925 is an apocalyptic number.

18413925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18413925 is a deficient number, since it is larger than the sum of its proper divisors (12030555).

18413925 is a wasteful number, since it uses less digits than its factorization.

18413925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245532 (or 245527 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 18413925 is about 4291.1449521078. The cubic root of 18413925 is about 264.0678057008.

The spelling of 18413925 in words is "eighteen million, four hundred thirteen thousand, nine hundred twenty-five".