18220850 has 12 divisors (see below), whose sum is σ = 33890874. Its totient is φ = 7288320.

The previous prime is 18220849. The next prime is 18220861. The reversal of 18220850 is 5802281.

It can be written as a sum of positive squares in 3 ways, for example, as 7284601 + 10936249 = 2699^2 + 3307^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 182159 + ... + 182258.

Almost surely, 2^18220850 is an apocalyptic number.

18220850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18220850 is a deficient number, since it is larger than the sum of its proper divisors (15670024).

18220850 is a wasteful number, since it uses less digits than its factorization.

18220850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364429 (or 364424 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 18220850 is about 4268.5887597659. The cubic root of 18220850 is about 263.1416201514.

The spelling of 18220850 in words is "eighteen million, two hundred twenty thousand, eight hundred fifty".