18917252 has 12 divisors (see below), whose sum is σ = 33220236. Its totient is φ = 9425760.

The previous prime is 18917233. The next prime is 18917263. The reversal of 18917252 is 25271981.

It can be written as a sum of positive squares in 2 ways, for example, as 13645636 + 5271616 = 3694^2 + 2296^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6899 + ... + 9242.

It is an arithmetic number, because the mean of its divisors is an integer number (2768353).

Almost surely, 2^18917252 is an apocalyptic number.

It is an amenable number.

18917252 is a deficient number, since it is larger than the sum of its proper divisors (14302984).

18917252 is a wasteful number, since it uses less digits than its factorization.

18917252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16438 (or 16436 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 18917252 is about 4349.3967397790. The cubic root of 18917252 is about 266.4522241280.

The spelling of 18917252 in words is "eighteen million, nine hundred seventeen thousand, two hundred fifty-two".