18867572 has 12 divisors (see below), whose sum is σ = 33240900. Its totient is φ = 9370176.

The previous prime is 18867571. The next prime is 18867577. The reversal of 18867572 is 27576881.

It can be written as a sum of positive squares in 2 ways, for example, as 5354596 + 13512976 = 2314^2 + 3676^2 .

It is a super-3 number, since 3×18867572³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18867571) 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, 15233 + ... + 16424.

It is an arithmetic number, because the mean of its divisors is an integer number (2770075).

Almost surely, 2^18867572 is an apocalyptic number.

It is an amenable number.

18867572 is a deficient number, since it is larger than the sum of its proper divisors (14373328).

18867572 is a wasteful number, since it uses less digits than its factorization.

18867572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31810 (or 31808 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The square root of 18867572 is about 4343.6818483862. The cubic root of 18867572 is about 266.2187696550.

The spelling of 18867572 in words is "eighteen million, eight hundred sixty-seven thousand, five hundred seventy-two".