21102332320 has 48 divisors (see below), whose sum is σ = 50171862888. Its totient is φ = 8387159040.

The previous prime is 21102332263. The next prime is 21102332327. The reversal of 21102332320 is 2323320112.

It can be written as a sum of positive squares in 4 ways, for example, as 17611413264 + 3490919056 = 132708^2 + 59084^2 .

It is not an unprimeable number, because it can be changed into a prime (21102332327) 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, 394911 + ... + 445150.

Almost surely, 2^21102332320 is an apocalyptic number.

21102332320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102332320 is an abundant number, since it is smaller than the sum of its proper divisors (29069530568).

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

21102332320 is a wasteful number, since it uses less digits than its factorization.

21102332320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840233 (or 840225 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21102332320 its reverse (2323320112), we get a palindrome (23425652432).

The spelling of 21102332320 in words is "twenty-one billion, one hundred two million, three hundred thirty-two thousand, three hundred twenty".