22091022 has 32 divisors (see below), whose sum is σ = 49245600. Its totient is φ = 7340544.

The previous prime is 22091021. The next prime is 22091033. The reversal of 22091022 is 22019022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22090986 and 22091004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22091021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30804 + ... + 31512.

It is an arithmetic number, because the mean of its divisors is an integer number (1538925).

Almost surely, 2^22091022 is an apocalyptic number.

22091022 is an abundant number, since it is smaller than the sum of its proper divisors (27154578).

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

22091022 is a wasteful number, since it uses less digits than its factorization.

22091022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 22091022 is about 4700.1087221468. The cubic root of 22091022 is about 280.5898365340.

The spelling of 22091022 in words is "twenty-two million, ninety-one thousand, twenty-two".