18480172 has 24 divisors (see below), whose sum is σ = 32986800. Its totient is φ = 9057600.

The previous prime is 18480167. The next prime is 18480181. The reversal of 18480172 is 27108481.

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, 60043 + ... + 60349.

It is an arithmetic number, because the mean of its divisors is an integer number (1374450).

Almost surely, 2^18480172 is an apocalyptic number.

It is an amenable number.

18480172 is a deficient number, since it is larger than the sum of its proper divisors (14506628).

18480172 is a wasteful number, since it uses less digits than its factorization.

18480172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18480172 is about 4298.8570574049. The cubic root of 18480172 is about 264.3841018910.

The spelling of 18480172 in words is "eighteen million, four hundred eighty thousand, one hundred seventy-two".