21422343320 has 48 divisors (see below), whose sum is σ = 56069709840. Its totient is φ = 7344802752.

The previous prime is 21422343311. The next prime is 21422343353. The reversal of 21422343320 is 2334322412.

It is a self number, because there is not a number n which added to its sum of digits gives 21422343320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5462924 + ... + 5466843.

It is an arithmetic number, because the mean of its divisors is an integer number (1168118955).

Almost surely, 2^21422343320 is an apocalyptic number.

21422343320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21422343320 is an abundant number, since it is smaller than the sum of its proper divisors (34647366520).

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

21422343320 is a wasteful number, since it uses less digits than its factorization.

21422343320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10929792 (or 10929781 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21422343320 its reverse (2334322412), we get a palindrome (23756665732).

The spelling of 21422343320 in words is "twenty-one billion, four hundred twenty-two million, three hundred forty-three thousand, three hundred twenty".