18181075 has 24 divisors (see below), whose sum is σ = 26047440. Its totient is φ = 12441600.

The previous prime is 18181039. The next prime is 18181103. The reversal of 18181075 is 57018181.

It is not a de Polignac number, because 18181075 - 2⁹ = 18180563 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2731 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (1085310).

Almost surely, 2^18181075 is an apocalyptic number.

18181075 is a deficient number, since it is larger than the sum of its proper divisors (7866365).

18181075 is a wasteful number, since it uses less digits than its factorization.

18181075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927 (or 3922 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 18181075 is about 4263.9271804289. The cubic root of 18181075 is about 262.9500066415.

The spelling of 18181075 in words is "eighteen million, one hundred eighty-one thousand, seventy-five".