18842634 has 24 divisors (see below), whose sum is σ = 42234660. Its totient is φ = 6064128.

The previous prime is 18842633. The next prime is 18842639. The reversal of 18842634 is 43624881.

18842634 is a `hidden beast` number, since 18 + 8 + 4 + 2 + 634 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18275625 + 567009 = 4275^2 + 753^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18842633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17527 + ... + 18570.

Almost surely, 2^18842634 is an apocalyptic number.

18842634 is an abundant number, since it is smaller than the sum of its proper divisors (23392026).

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

18842634 is a wasteful number, since it uses less digits than its factorization.

18842634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36134 (or 36131 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 18842634 is about 4340.8102930213. The cubic root of 18842634 is about 266.1014273914.

The spelling of 18842634 in words is "eighteen million, eight hundred forty-two thousand, six hundred thirty-four".