21230323320 has 32 divisors (see below), whose sum is σ = 63690970320. Its totient is φ = 5661419520.

The previous prime is 21230323319. The next prime is 21230323339. The reversal of 21230323320 is 2332303212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88459561 + ... + 88459800.

Almost surely, 2^21230323320 is an apocalyptic number.

21230323320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230323320 is an abundant number, since it is smaller than the sum of its proper divisors (42460647000).

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

21230323320 is a wasteful number, since it uses less digits than its factorization.

21230323320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176919375 (or 176919371 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21230323320 its reverse (2332303212), we get a palindrome (23562626532).

The spelling of 21230323320 in words is "twenty-one billion, two hundred thirty million, three hundred twenty-three thousand, three hundred twenty".