22090420 has 24 divisors (see below), whose sum is σ = 50607648. Its totient is φ = 8032800.

The previous prime is 22090379. The next prime is 22090427. The reversal of 22090420 is 2409022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22090427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49986 + ... + 50425.

It is an arithmetic number, because the mean of its divisors is an integer number (2108652).

Almost surely, 2^22090420 is an apocalyptic number.

22090420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22090420 is an abundant number, since it is smaller than the sum of its proper divisors (28517228).

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

22090420 is a wasteful number, since it uses less digits than its factorization.

22090420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100431 (or 100429 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 22090420 is about 4700.0446806387. The cubic root of 22090420 is about 280.5872877366.

Adding to 22090420 its reverse (2409022), we get a palindrome (24499442).

The spelling of 22090420 in words is "twenty-two million, ninety thousand, four hundred twenty".