22202431220 has 12 divisors (see below), whose sum is σ = 46625105604. Its totient is φ = 8880972480.

The previous prime is 22202431217. The next prime is 22202431243. The reversal of 22202431220 is 2213420222.

It can be written as a sum of positive squares in 2 ways, for example, as 2988590224 + 19213840996 = 54668^2 + 138614^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1110121561 = 22202431220 / (2 + 2 + 2 + 0 + 2 + 4 + 3 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 22202431192 and 22202431201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555060761 + ... + 555060800.

It is an arithmetic number, because the mean of its divisors is an integer number (3885425467).

Almost surely, 2^22202431220 is an apocalyptic number.

22202431220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22202431220 is an abundant number, since it is smaller than the sum of its proper divisors (24422674384).

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

22202431220 is a wasteful number, since it uses less digits than its factorization.

22202431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110121570 (or 1110121568 counting only the distinct ones).

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

Adding to 22202431220 its reverse (2213420222), we get a palindrome (24415851442).

The spelling of 22202431220 in words is "twenty-two billion, two hundred two million, four hundred thirty-one thousand, two hundred twenty".