18357572 has 18 divisors (see below), whose sum is σ = 33908238. Its totient is φ = 8695008.

The previous prime is 18357533. The next prime is 18357607. The reversal of 18357572 is 27575381.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18113536 + 244036 = 4256^2 + 494^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4913 + ... + 7800.

It is an arithmetic number, because the mean of its divisors is an integer number (1883791).

Almost surely, 2^18357572 is an apocalyptic number.

It is an amenable number.

18357572 is a deficient number, since it is larger than the sum of its proper divisors (15550666).

18357572 is a wasteful number, since it uses less digits than its factorization.

18357572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12755 (or 12734 counting only the distinct ones).

The product of its digits is 58800, while the sum is 38.

The square root of 18357572 is about 4284.5737244211. The cubic root of 18357572 is about 263.7981507292.

The spelling of 18357572 in words is "eighteen million, three hundred fifty-seven thousand, five hundred seventy-two".