18036768 has 24 divisors (see below), whose sum is σ = 47346768. Its totient is φ = 6012224.

The previous prime is 18036751. The next prime is 18036791. The reversal of 18036768 is 86763081.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93846 + ... + 94037.

It is an arithmetic number, because the mean of its divisors is an integer number (1972782).

Almost surely, 2^18036768 is an apocalyptic number.

It is an amenable number.

18036768 is an abundant number, since it is smaller than the sum of its proper divisors (29310000).

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

18036768 is a wasteful number, since it uses less digits than its factorization.

18036768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187896 (or 187888 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 18036768 is about 4246.9716269361. The cubic root of 18036768 is about 262.2524614281.

The spelling of 18036768 in words is "eighteen million, thirty-six thousand, seven hundred sixty-eight".