21422231020 has 24 divisors (see below), whose sum is σ = 44990273664. Its totient is φ = 8568208896.

The previous prime is 21422230993. The next prime is 21422231021. The reversal of 21422231020 is 2013222412.

It is not an unprimeable number, because it can be changed into a prime (21422231021) 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, 270172 + ... + 340348.

It is an arithmetic number, because the mean of its divisors is an integer number (1874594736).

Almost surely, 2^21422231020 is an apocalyptic number.

21422231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21422231020 is an abundant number, since it is smaller than the sum of its proper divisors (23568042644).

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

21422231020 is a wasteful number, since it uses less digits than its factorization.

21422231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85449 (or 85447 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21422231020 its reverse (2013222412), we get a palindrome (23435453432).

The spelling of 21422231020 in words is "twenty-one billion, four hundred twenty-two million, two hundred thirty-one thousand, twenty".