18136974 has 24 divisors (see below), whose sum is σ = 36846072. Its totient is φ = 5951200.

The previous prime is 18136969. The next prime is 18136981. The reversal of 18136974 is 47963181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104752 + ... + 104924.

It is an arithmetic number, because the mean of its divisors is an integer number (1535253).

Almost surely, 2^18136974 is an apocalyptic number.

18136974 is an abundant number, since it is smaller than the sum of its proper divisors (18709098).

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

18136974 is a wasteful number, since it uses less digits than its factorization.

18136974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 279 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 18136974 is about 4258.7526342815. The cubic root of 18136974 is about 262.7372259130.

It can be divided in two parts, 18136 and 974, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 18136974 in words is "eighteen million, one hundred thirty-six thousand, nine hundred seventy-four".