21233022320 has 40 divisors (see below), whose sum is σ = 49487554320. Its totient is φ = 8472430080.

The previous prime is 21233022319. The next prime is 21233022341. The reversal of 21233022320 is 2322033212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21233022292 and 21233022301.

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, 291746 + ... + 357185.

It is an arithmetic number, because the mean of its divisors is an integer number (1237188858).

Almost surely, 2^21233022320 is an apocalyptic number.

21233022320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233022320 is an abundant number, since it is smaller than the sum of its proper divisors (28254532000).

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

21233022320 is a wasteful number, since it uses less digits than its factorization.

21233022320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649353 (or 649347 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21233022320 its reverse (2322033212), we get a palindrome (23555055532).

The spelling of 21233022320 in words is "twenty-one billion, two hundred thirty-three million, twenty-two thousand, three hundred twenty".