18136925 has 12 divisors (see below), whose sum is σ = 23674080. Its totient is φ = 13745520.

The previous prime is 18136907. The next prime is 18136931. The reversal of 18136925 is 52963181.

It is a de Polignac number, because none of the positive numbers 2^k-18136925 is a prime.

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, 18617 + ... + 19566.

It is an arithmetic number, because the mean of its divisors is an integer number (1972840).

Almost surely, 2^18136925 is an apocalyptic number.

It is an amenable number.

18136925 is a deficient number, since it is larger than the sum of its proper divisors (5537155).

18136925 is a wasteful number, since it uses less digits than its factorization.

18136925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38212 (or 38207 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 18136925 is about 4258.7468814195. The cubic root of 18136925 is about 262.7369893036.

The spelling of 18136925 in words is "eighteen million, one hundred thirty-six thousand, nine hundred twenty-five".