21323333020 has 48 divisors (see below), whose sum is σ = 49234526208. Its totient is φ = 7692874560.

The previous prime is 21323332991. The next prime is 21323333023. The reversal of 21323333020 is 2033332312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21323332982 and 21323333000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323333023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353652 + ... + 409531.

It is an arithmetic number, because the mean of its divisors is an integer number (1025719296).

Almost surely, 2^21323333020 is an apocalyptic number.

21323333020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323333020 is an abundant number, since it is smaller than the sum of its proper divisors (27911193188).

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

21323333020 is a wasteful number, since it uses less digits than its factorization.

21323333020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763330 (or 763328 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 21323333020 its reverse (2033332312), we get a palindrome (23356665332).

The spelling of 21323333020 in words is "twenty-one billion, three hundred twenty-three million, three hundred thirty-three thousand, twenty".