18873472 has 16 divisors (see below), whose sum is σ = 37599750. Its totient is φ = 9436672.

The previous prime is 18873469. The next prime is 18873473. The reversal of 18873472 is 27437881.

It can be written as a sum of positive squares in only one way, i.e., 18870336 + 3136 = 4344^2 + 56^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (18873473) by changing a digit.

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, 73597 + ... + 73852.

Almost surely, 2^18873472 is an apocalyptic number.

It is an amenable number.

18873472 is a deficient number, since it is larger than the sum of its proper divisors (18726278).

18873472 is an equidigital number, since it uses as much as digits as its factorization.

18873472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147463 (or 147451 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 18873472 is about 4344.3609426474. The cubic root of 18873472 is about 266.2465161512.

The spelling of 18873472 in words is "eighteen million, eight hundred seventy-three thousand, four hundred seventy-two".