18874236 has 12 divisors (see below), whose sum is σ = 44039912. Its totient is φ = 6291408.

The previous prime is 18874231. The next prime is 18874241. The reversal of 18874236 is 63247881.

It is an interprime number because it is at equal distance from previous prime (18874231) and next prime (18874241).

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 18874194 and 18874203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786415 + ... + 786438.

Almost surely, 2^18874236 is an apocalyptic number.

It is an amenable number.

18874236 is an abundant number, since it is smaller than the sum of its proper divisors (25165676).

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

18874236 is a wasteful number, since it uses less digits than its factorization.

18874236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572860 (or 1572858 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 18874236 is about 4344.4488718363. The cubic root of 18874236 is about 266.2501086645.

It can be divided in two parts, 18874 and 236, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 18874236 in words is "eighteen million, eight hundred seventy-four thousand, two hundred thirty-six".