18136074 has 32 divisors (see below), whose sum is σ = 39948480. Its totient is φ = 5443200.

The previous prime is 18136073. The next prime is 18136087. The reversal of 18136074 is 47063181.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18136073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5934 + ... + 8454.

It is an arithmetic number, because the mean of its divisors is an integer number (1248390).

Almost surely, 2^18136074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18136074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19974240).

18136074 is an abundant number, since it is smaller than the sum of its proper divisors (21812406).

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

18136074 is a wasteful number, since it uses less digits than its factorization.

18136074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 18136074 is about 4258.6469682283. The cubic root of 18136074 is about 262.7328799580.

It can be divided in two parts, 1813 and 6074, that added together give a palindrome (7887).

The spelling of 18136074 in words is "eighteen million, one hundred thirty-six thousand, seventy-four".