18051336 has 80 divisors (see below), whose sum is σ = 51291900. Its totient is φ = 5930496.

The previous prime is 18051329. The next prime is 18051347. The reversal of 18051336 is 63315081.

It can be written as a sum of positive squares in 2 ways, for example, as 13616100 + 4435236 = 3690^2 + 2106^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 57516 + ... + 57828.

Almost surely, 2^18051336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18051336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25645950).

18051336 is an abundant number, since it is smaller than the sum of its proper divisors (33240564).

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

18051336 is a wasteful number, since it uses less digits than its factorization.

18051336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 18051336 is about 4248.6863852254. The cubic root of 18051336 is about 262.3230480900.

The spelling of 18051336 in words is "eighteen million, fifty-one thousand, three hundred thirty-six".