18135976 has 16 divisors (see below), whose sum is σ = 34141140. Its totient is φ = 9031680.

The previous prime is 18135967. The next prime is 18135979. The reversal of 18135976 is 67953181.

It can be written as a sum of positive squares in 2 ways, for example, as 15413476 + 2722500 = 3926^2 + 1650^2 .

It is not an unprimeable number, because it can be changed into a prime (18135979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2355 + ... + 6466.

Almost surely, 2^18135976 is an apocalyptic number.

It is an amenable number.

18135976 is a deficient number, since it is larger than the sum of its proper divisors (16005164).

18135976 is a wasteful number, since it uses less digits than its factorization.

18135976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9084 (or 9080 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 18135976 is about 4258.6354622109. The cubic root of 18135976 is about 262.7324067231.

The spelling of 18135976 in words is "eighteen million, one hundred thirty-five thousand, nine hundred seventy-six".