18572090 has 8 divisors (see below), whose sum is σ = 33429780. Its totient is φ = 7428832.

The previous prime is 18572089. The next prime is 18572107. The reversal of 18572090 is 9027581.

It can be written as a sum of positive squares in 2 ways, for example, as 15108769 + 3463321 = 3887^2 + 1861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 928595 + ... + 928614.

Almost surely, 2^18572090 is an apocalyptic number.

18572090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18572090 is a deficient number, since it is larger than the sum of its proper divisors (14857690).

18572090 is a wasteful number, since it uses less digits than its factorization.

18572090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857216.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 18572090 is about 4309.5347776761. The cubic root of 18572090 is about 264.8217146603.

The spelling of 18572090 in words is "eighteen million, five hundred seventy-two thousand, ninety".