18851372 has 24 divisors (see below), whose sum is σ = 34062336. Its totient is φ = 9123408.

The previous prime is 18851359. The next prime is 18851381. The reversal of 18851372 is 27315881.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21413 + ... + 22275.

It is an arithmetic number, because the mean of its divisors is an integer number (1419264).

Almost surely, 2^18851372 is an apocalyptic number.

It is an amenable number.

18851372 is a deficient number, since it is larger than the sum of its proper divisors (15210964).

18851372 is a wasteful number, since it uses less digits than its factorization.

18851372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037 (or 1035 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 18851372 is about 4341.8166704733. The cubic root of 18851372 is about 266.1425546022.

The spelling of 18851372 in words is "eighteen million, eight hundred fifty-one thousand, three hundred seventy-two".