18636942 has 8 divisors (see below), whose sum is σ = 37273896. Its totient is φ = 6212312.

The previous prime is 18636911. The next prime is 18636953. The reversal of 18636942 is 24963681.

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

18636942 is an admirable number.

It is a super-2 number, since 2×18636942² = 694671214222728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18636942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1553073 + ... + 1553084.

It is an arithmetic number, because the mean of its divisors is an integer number (4659237).

Almost surely, 2^18636942 is an apocalyptic number.

18636942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18636942 is a wasteful number, since it uses less digits than its factorization.

18636942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106162.

The product of its digits is 62208, while the sum is 39.

The square root of 18636942 is about 4317.0524666721. The cubic root of 18636942 is about 265.1296007818.

It can be divided in two parts, 186 and 36942, that added together give a triangular number (37128 = T₂₇₂).

The spelling of 18636942 in words is "eighteen million, six hundred thirty-six thousand, nine hundred forty-two".