18122137 has 16 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 15550480.

The previous prime is 18122113. The next prime is 18122141. The reversal of 18122137 is 73122181.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18122137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18122107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20568 + ... + 21430.

It is an arithmetic number, because the mean of its divisors is an integer number (1306368).

Almost surely, 2^18122137 is an apocalyptic number.

It is an amenable number.

18122137 is a deficient number, since it is larger than the sum of its proper divisors (2779751).

18122137 is a wasteful number, since it uses less digits than its factorization.

18122137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980.

The product of its digits is 672, while the sum is 25.

The square root of 18122137 is about 4257.0103359048. The cubic root of 18122137 is about 262.6655620714.

The spelling of 18122137 in words is "eighteen million, one hundred twenty-two thousand, one hundred thirty-seven".