21422332220 has 48 divisors (see below), whose sum is σ = 45415974240. Its totient is φ = 8487591936.

The previous prime is 21422332207. The next prime is 21422332231. The reversal of 21422332220 is 2223322412.

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, 887471 + ... + 911289.

It is an arithmetic number, because the mean of its divisors is an integer number (946166130).

Almost surely, 2^21422332220 is an apocalyptic number.

21422332220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21422332220 is an abundant number, since it is smaller than the sum of its proper divisors (23993642020).

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

21422332220 is a wasteful number, since it uses less digits than its factorization.

21422332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24254 (or 24252 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21422332220 its reverse (2223322412), we get a palindrome (23645654632).

The spelling of 21422332220 in words is "twenty-one billion, four hundred twenty-two million, three hundred thirty-two thousand, two hundred twenty".