18474642 has 20 divisors (see below), whose sum is σ = 41397246. Its totient is φ = 6158160.

The previous prime is 18474637. The next prime is 18474671. The reversal of 18474642 is 24647481.

18474642 is a `hidden beast` number, since 1 + 8 + 4 + 7 + 4 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17969121 + 505521 = 4239^2 + 711^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18474597 and 18474606.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 56859 + ... + 57182.

Almost surely, 2^18474642 is an apocalyptic number.

18474642 is an abundant number, since it is smaller than the sum of its proper divisors (22922604).

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

18474642 is a wasteful number, since it uses less digits than its factorization.

18474642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114055 (or 114046 counting only the distinct ones).

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

The square root of 18474642 is about 4298.2138150632. The cubic root of 18474642 is about 264.3577278591.

The spelling of 18474642 in words is "eighteen million, four hundred seventy-four thousand, six hundred forty-two".