18436874 has 8 divisors (see below), whose sum is σ = 29282148. Its totient is φ = 8676160.

The previous prime is 18436871. The next prime is 18436879. The reversal of 18436874 is 47863481.

It can be written as a sum of positive squares in 2 ways, for example, as 17581249 + 855625 = 4193^2 + 925^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18436871) 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, 271097 + ... + 271164.

Almost surely, 2^18436874 is an apocalyptic number.

18436874 is a deficient number, since it is larger than the sum of its proper divisors (10845274).

18436874 is a wasteful number, since it uses less digits than its factorization.

18436874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542280.

The product of its digits is 129024, while the sum is 41.

The square root of 18436874 is about 4293.8181144525. The cubic root of 18436874 is about 264.1774614149.

The spelling of 18436874 in words is "eighteen million, four hundred thirty-six thousand, eight hundred seventy-four".