18366936 has 128 divisors (see below), whose sum is σ = 57024000. Its totient is φ = 4810752.

The previous prime is 18366923. The next prime is 18366979. The reversal of 18366936 is 63966381.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168450 + ... + 168558.

It is an arithmetic number, because the mean of its divisors is an integer number (445500).

Almost surely, 2^18366936 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 18366936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28512000).

18366936 is an abundant number, since it is smaller than the sum of its proper divisors (38657064).

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

18366936 is a wasteful number, since it uses less digits than its factorization.

18366936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 197 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 18366936 is about 4285.6663425890. Note that the first 3 decimals coincide. The cubic root of 18366936 is about 263.8429966379.

The spelling of 18366936 in words is "eighteen million, three hundred sixty-six thousand, nine hundred thirty-six".