18800213 has 8 divisors (see below), whose sum is σ = 19251000. Its totient is φ = 18353088.

The previous prime is 18800209. The next prime is 18800233. The reversal of 18800213 is 31200881.

It can be written as a sum of positive squares in 4 ways, for example, as 7524049 + 11276164 = 2743^2 + 3358^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18800213 - 2² = 18800209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18800233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11363 + ... + 12911.

It is an arithmetic number, because the mean of its divisors is an integer number (2406375).

Almost surely, 2^18800213 is an apocalyptic number.

It is an amenable number.

18800213 is a deficient number, since it is larger than the sum of its proper divisors (450787).

18800213 is a wasteful number, since it uses less digits than its factorization.

18800213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 18800213 is about 4335.9212400596. The cubic root of 18800213 is about 265.9015832421.

The spelling of 18800213 in words is "eighteen million, eight hundred thousand, two hundred thirteen".