18275971 has 6 divisors (see below), whose sum is σ = 21259860. Its totient is φ = 15665076.

The previous prime is 18275963. The next prime is 18275977. The reversal of 18275971 is 17957281.

It is not a de Polignac number, because 18275971 - 2³ = 18275963 is a prime.

It is a super-2 number, since 2×18275971² = 668022231985682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18275977) 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 5 ways as a sum of consecutive naturals, for example, 186441 + ... + 186538.

It is an arithmetic number, because the mean of its divisors is an integer number (3543310).

Almost surely, 2^18275971 is an apocalyptic number.

18275971 is a deficient number, since it is larger than the sum of its proper divisors (2983889).

18275971 is an equidigital number, since it uses as much as digits as its factorization.

18275971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372993 (or 372986 counting only the distinct ones).

The product of its digits is 35280, while the sum is 40.

The square root of 18275971 is about 4275.0404676447. The cubic root of 18275971 is about 263.4067015920.

The spelling of 18275971 in words is "eighteen million, two hundred seventy-five thousand, nine hundred seventy-one".