21323233320 has 32 divisors (see below), whose sum is σ = 63969700320. Its totient is φ = 5686195520.

The previous prime is 21323233319. The next prime is 21323233357. The reversal of 21323233320 is 2333232312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88846686 + ... + 88846925.

It is an arithmetic number, because the mean of its divisors is an integer number (1999053135).

Almost surely, 2^21323233320 is an apocalyptic number.

21323233320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323233320 is an abundant number, since it is smaller than the sum of its proper divisors (42646467000).

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

21323233320 is a wasteful number, since it uses less digits than its factorization.

21323233320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177693625 (or 177693621 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21323233320 its reverse (2333232312), we get a palindrome (23656465632).

The spelling of 21323233320 in words is "twenty-one billion, three hundred twenty-three million, two hundred thirty-three thousand, three hundred twenty".