19218222 has 40 divisors (see below), whose sum is σ = 43542576. Its totient is φ = 6334848.

The previous prime is 19218181. The next prime is 19218239. The reversal of 19218222 is 22281291.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15103 + ... + 16325.

Almost surely, 2^19218222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19218222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21771288).

19218222 is an abundant number, since it is smaller than the sum of its proper divisors (24324354).

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

19218222 is a wasteful number, since it uses less digits than its factorization.

19218222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334 (or 1325 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 19218222 is about 4383.8592586898. The cubic root of 19218222 is about 267.8578644095.

The spelling of 19218222 in words is "nineteen million, two hundred eighteen thousand, two hundred twenty-two".