18572850 has 72 divisors (see below), whose sum is σ = 50415300. Its totient is φ = 4901760.

The previous prime is 18572833. The next prime is 18572863. The reversal of 18572850 is 5827581.

18572850 is a `hidden beast` number, since 1 + 8 + 572 + 85 + 0 = 666.

18572850 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 6 ways, for example, as 1108809 + 17464041 = 1053^2 + 4179^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66912 + ... + 67188.

Almost surely, 2^18572850 is an apocalyptic number.

18572850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18572850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25207650).

18572850 is an abundant number, since it is smaller than the sum of its proper divisors (31842450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18572850 is a wasteful number, since it uses less digits than its factorization.

18572850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 18572850 is about 4309.6229533452. The cubic root of 18572850 is about 264.8253269222.

The spelling of 18572850 in words is "eighteen million, five hundred seventy-two thousand, eight hundred fifty".