18361744 has 40 divisors (see below), whose sum is σ = 36961920. Its totient is φ = 8830848.

The previous prime is 18361723. The next prime is 18361747. The reversal of 18361744 is 44716381.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18361747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49849 + ... + 50215.

It is an arithmetic number, because the mean of its divisors is an integer number (924048).

Almost surely, 2^18361744 is an apocalyptic number.

It is an amenable number.

18361744 is an abundant number, since it is smaller than the sum of its proper divisors (18600176).

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

18361744 is a wasteful number, since it uses less digits than its factorization.

18361744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 481 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 18361744 is about 4285.0605596654. The cubic root of 18361744 is about 263.8181330835.

The spelling of 18361744 in words is "eighteen million, three hundred sixty-one thousand, seven hundred forty-four".