18244988 has 12 divisors (see below), whose sum is σ = 32958912. Its totient is φ = 8828160.

The previous prime is 18244987. The next prime is 18244991. The reversal of 18244988 is 88944281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18244987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73445 + ... + 73692.

It is an arithmetic number, because the mean of its divisors is an integer number (2746576).

Almost surely, 2^18244988 is an apocalyptic number.

It is an amenable number.

18244988 is a deficient number, since it is larger than the sum of its proper divisors (14713924).

18244988 is a wasteful number, since it uses less digits than its factorization.

18244988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147172 (or 147170 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 18244988 is about 4271.4152221483. The cubic root of 18244988 is about 263.2577674897.

The spelling of 18244988 in words is "eighteen million, two hundred forty-four thousand, nine hundred eighty-eight".