18244772 has 24 divisors (see below), whose sum is σ = 39297216. Its totient is φ = 7217568.

The previous prime is 18244729. The next prime is 18244777. The reversal of 18244772 is 27744281.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18244777) 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, 24698 + ... + 25425.

It is an arithmetic number, because the mean of its divisors is an integer number (1637384).

Almost surely, 2^18244772 is an apocalyptic number.

It is an amenable number.

18244772 is an abundant number, since it is smaller than the sum of its proper divisors (21052444).

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

18244772 is a wasteful number, since it uses less digits than its factorization.

18244772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50147 (or 50145 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 18244772 is about 4271.3899377135. The cubic root of 18244772 is about 263.2567285943.

The spelling of 18244772 in words is "eighteen million, two hundred forty-four thousand, seven hundred seventy-two".