18464274 has 40 divisors (see below), whose sum is σ = 41621580. Its totient is φ = 6117984.

The previous prime is 18464267. The next prime is 18464287. The reversal of 18464274 is 47246481.

18464274 is a `hidden beast` number, since 1 + 8 + 4 + 642 + 7 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18122049 + 342225 = 4257^2 + 585^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47272 + ... + 47660.

Almost surely, 2^18464274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18464274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20810790).

18464274 is an abundant number, since it is smaller than the sum of its proper divisors (23157306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18464274 is a wasteful number, since it uses less digits than its factorization.

18464274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 687 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 18464274 is about 4297.0075634097. The cubic root of 18464274 is about 264.3082659388.

The spelling of 18464274 in words is "eighteen million, four hundred sixty-four thousand, two hundred seventy-four".