18701372 has 6 divisors (see below), whose sum is σ = 32727408. Its totient is φ = 9350684.

The previous prime is 18701357. The next prime is 18701399. The reversal of 18701372 is 27310781.

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 as a sum of consecutive naturals, namely, 2337668 + ... + 2337675.

It is an arithmetic number, because the mean of its divisors is an integer number (5454568).

Almost surely, 2^18701372 is an apocalyptic number.

It is an amenable number.

18701372 is a deficient number, since it is larger than the sum of its proper divisors (14026036).

18701372 is a wasteful number, since it uses less digits than its factorization.

18701372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675347 (or 4675345 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 18701372 is about 4324.5082957488. The cubic root of 18701372 is about 265.4347769700.

The spelling of 18701372 in words is "eighteen million, seven hundred one thousand, three hundred seventy-two".