22426220 has 48 divisors (see below), whose sum is σ = 48898080. Its totient is φ = 8633856.

The previous prime is 22426211. The next prime is 22426231. The reversal of 22426220 is 2262422.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22426192 and 22426201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76394 + ... + 76686.

It is an arithmetic number, because the mean of its divisors is an integer number (1018710).

Almost surely, 2^22426220 is an apocalyptic number.

22426220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22426220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24449040).

22426220 is an abundant number, since it is smaller than the sum of its proper divisors (26471860).

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

22426220 is a wasteful number, since it uses less digits than its factorization.

22426220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22426220 is about 4735.6330094297. The cubic root of 22426220 is about 282.0018945935.

Adding to 22426220 its reverse (2262422), we get a palindrome (24688642).

The spelling of 22426220 in words is "twenty-two million, four hundred twenty-six thousand, two hundred twenty".