20422221320 has 64 divisors (see below), whose sum is σ = 46676476800. Its totient is φ = 8040130560.

The previous prime is 20422221301. The next prime is 20422221359. The reversal of 20422221320 is 2312222402.

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 = 20422221292 and 20422221301.

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, 1752152 + ... + 1763768.

It is an arithmetic number, because the mean of its divisors is an integer number (729319950).

Almost surely, 2^20422221320 is an apocalyptic number.

20422221320 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 20422221320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23338238400).

20422221320 is an abundant number, since it is smaller than the sum of its proper divisors (26254255480).

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

20422221320 is a wasteful number, since it uses less digits than its factorization.

20422221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12318 (or 12314 counting only the distinct ones).

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

Adding to 20422221320 its reverse (2312222402), we get a palindrome (22734443722).

The spelling of 20422221320 in words is "twenty billion, four hundred twenty-two million, two hundred twenty-one thousand, three hundred twenty".