18274536 has 96 divisors (see below), whose sum is σ = 57283200. Its totient is φ = 5155200.

The previous prime is 18274519. The next prime is 18274537. The reversal of 18274536 is 63547281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18274536.

It is not an unprimeable number, because it can be changed into a prime (18274537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50725 + ... + 51083.

It is an arithmetic number, because the mean of its divisors is an integer number (596700).

Almost surely, 2^18274536 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 18274536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28641600).

18274536 is an abundant number, since it is smaller than the sum of its proper divisors (39008664).

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

18274536 is a wasteful number, since it uses less digits than its factorization.

18274536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 472 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 18274536 is about 4274.8726296815. The cubic root of 18274536 is about 263.3998073206.

The spelling of 18274536 in words is "eighteen million, two hundred seventy-four thousand, five hundred thirty-six".