18045772 has 24 divisors (see below), whose sum is σ = 34594560. Its totient is φ = 8198400.

The previous prime is 18045739. The next prime is 18045773. The reversal of 18045772 is 27754081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (18045773) 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, 2604 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^18045772 is an apocalyptic number.

It is an amenable number.

18045772 is a deficient number, since it is larger than the sum of its proper divisors (16548788).

18045772 is a wasteful number, since it uses less digits than its factorization.

18045772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9201 (or 9199 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 18045772 is about 4248.0315441390. The cubic root of 18045772 is about 262.2960931982.

The spelling of 18045772 in words is "eighteen million, forty-five thousand, seven hundred seventy-two".