18750222 has 24 divisors (see below), whose sum is σ = 40707576. Its totient is φ = 6237456.

The previous prime is 18750163. The next prime is 18750229. The reversal of 18750222 is 22205781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18750229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13693 + ... + 14999.

It is an arithmetic number, because the mean of its divisors is an integer number (1696149).

Almost surely, 2^18750222 is an apocalyptic number.

18750222 is an abundant number, since it is smaller than the sum of its proper divisors (21957354).

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

18750222 is a wasteful number, since it uses less digits than its factorization.

18750222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18750222 is about 4330.1526531983. The cubic root of 18750222 is about 265.6656907813.

The spelling of 18750222 in words is "eighteen million, seven hundred fifty thousand, two hundred twenty-two".