20422040020 has 24 divisors (see below), whose sum is σ = 42889933800. Its totient is φ = 8168120832.

The previous prime is 20422039993. The next prime is 20422040027. The reversal of 20422040020 is 2004022402.

It can be written as a sum of positive squares in 4 ways, for example, as 8871379344 + 11550660676 = 94188^2 + 107474^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20422039976 and 20422040003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422040027) 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, 243736 + ... + 316624.

It is an arithmetic number, because the mean of its divisors is an integer number (1787080575).

Almost surely, 2^20422040020 is an apocalyptic number.

20422040020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20422040020 is an abundant number, since it is smaller than the sum of its proper divisors (22467893780).

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

20422040020 is a wasteful number, since it uses less digits than its factorization.

20422040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86907 (or 86905 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20422040020 its reverse (2004022402), we get a palindrome (22426062422).

The spelling of 20422040020 in words is "twenty billion, four hundred twenty-two million, forty thousand, twenty".