18850218 has 16 divisors (see below), whose sum is σ = 37842816. Its totient is φ = 6259680.

The previous prime is 18850217. The next prime is 18850219. The reversal of 18850218 is 81205881.

It is an interprime number because it is at equal distance from previous prime (18850217) and next prime (18850219).

It is not an unprimeable number, because it can be changed into a prime (18850217) 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 7 ways as a sum of consecutive naturals, for example, 4171 + ... + 7422.

It is an arithmetic number, because the mean of its divisors is an integer number (2365176).

Almost surely, 2^18850218 is an apocalyptic number.

18850218 is an abundant number, since it is smaller than the sum of its proper divisors (18992598).

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

18850218 is a wasteful number, since it uses less digits than its factorization.

18850218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11869.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 18850218 is about 4341.6837747584. The cubic root of 18850218 is about 266.1371237901.

The spelling of 18850218 in words is "eighteen million, eight hundred fifty thousand, two hundred eighteen".