18131075 has 12 divisors (see below), whose sum is σ = 22587840. Its totient is φ = 14436960.

The previous prime is 18131051. The next prime is 18131077. The reversal of 18131075 is 57013181.

It is not a de Polignac number, because 18131075 - 2⁶ = 18131011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18131077) 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, 4142 + ... + 7308.

It is an arithmetic number, because the mean of its divisors is an integer number (1882320).

Almost surely, 2^18131075 is an apocalyptic number.

18131075 is a deficient number, since it is larger than the sum of its proper divisors (4456765).

18131075 is a wasteful number, since it uses less digits than its factorization.

18131075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406 (or 3401 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 18131075 is about 4258.0600042742. The cubic root of 18131075 is about 262.7087379752.

The spelling of 18131075 in words is "eighteen million, one hundred thirty-one thousand, seventy-five".