18268372 has 12 divisors (see below), whose sum is σ = 32085396. Its totient is φ = 9101120.

The previous prime is 18268361. The next prime is 18268373. The reversal of 18268372 is 27386281.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 5779216 = 3534^2 + 2404^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7003 + ... + 9250.

It is an arithmetic number, because the mean of its divisors is an integer number (2673783).

Almost surely, 2^18268372 is an apocalyptic number.

It is an amenable number.

18268372 is a deficient number, since it is larger than the sum of its proper divisors (13817024).

18268372 is a wasteful number, since it uses less digits than its factorization.

18268372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16538 (or 16536 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 18268372 is about 4274.1516117237. The cubic root of 18268372 is about 263.3701890767.

The spelling of 18268372 in words is "eighteen million, two hundred sixty-eight thousand, three hundred seventy-two".