18364842 has 12 divisors (see below), whose sum is σ = 39790530. Its totient is φ = 6121608.

The previous prime is 18364831. The next prime is 18364891. The reversal of 18364842 is 24846381.

18364842 is a `hidden beast` number, since 1 + 8 + 3 + 648 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 8946081 = 3069^2 + 2991^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18364797 and 18364806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510117 + ... + 510152.

Almost surely, 2^18364842 is an apocalyptic number.

18364842 is an abundant number, since it is smaller than the sum of its proper divisors (21425688).

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

18364842 is a wasteful number, since it uses less digits than its factorization.

18364842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020277 (or 1020274 counting only the distinct ones).

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

The square root of 18364842 is about 4285.4220328924. The cubic root of 18364842 is about 263.8329694123.

It can be divided in two parts, 1836484 and 2, that added together give a triangular number (1836486 = T₁₉₁₆).

The spelling of 18364842 in words is "eighteen million, three hundred sixty-four thousand, eight hundred forty-two".