18506975 has 6 divisors (see below), whose sum is σ = 22948680. Its totient is φ = 14805560.

The previous prime is 18506953. The next prime is 18506977. The reversal of 18506975 is 57960581.

It is not a de Polignac number, because 18506975 - 2¹⁶ = 18441439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18506977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370115 + ... + 370164.

It is an arithmetic number, because the mean of its divisors is an integer number (3824780).

Almost surely, 2^18506975 is an apocalyptic number.

18506975 is a deficient number, since it is larger than the sum of its proper divisors (4441705).

18506975 is an equidigital number, since it uses as much as digits as its factorization.

18506975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740289 (or 740284 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 18506975 is about 4301.9733843900. The cubic root of 18506975 is about 264.5118579880.

The spelling of 18506975 in words is "eighteen million, five hundred six thousand, nine hundred seventy-five".