18802213 has 12 divisors (see below), whose sum is σ = 19853184. Its totient is φ = 17787600.

The previous prime is 18802207. The next prime is 18802279. The reversal of 18802213 is 31220881.

It is not a de Polignac number, because 18802213 - 2⁹ = 18801701 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 (18802013) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 115270 + ... + 115432.

It is an arithmetic number, because the mean of its divisors is an integer number (1654432).

Almost surely, 2^18802213 is an apocalyptic number.

It is an amenable number.

18802213 is a deficient number, since it is larger than the sum of its proper divisors (1050971).

18802213 is an equidigital number, since it uses as much as digits as its factorization.

18802213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18802213 is about 4336.1518654217. The cubic root of 18802213 is about 265.9110119351.

The spelling of 18802213 in words is "eighteen million, eight hundred two thousand, two hundred thirteen".