21333760896 has 64 divisors (see below), whose sum is σ = 64763210880. Its totient is φ = 6095359488.

The previous prime is 21333760879. The next prime is 21333760919. The reversal of 21333760896 is 69806733312.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 3965646 + ... + 3971021.

It is an arithmetic number, because the mean of its divisors is an integer number (1011925170).

Almost surely, 2^21333760896 is an apocalyptic number.

It is an amenable number.

21333760896 is an abundant number, since it is smaller than the sum of its proper divisors (43429449984).

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

21333760896 is an equidigital number, since it uses as much as digits as its factorization.

21333760896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7936691 (or 7936679 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 21333760896 in words is "twenty-one billion, three hundred thirty-three million, seven hundred sixty thousand, eight hundred ninety-six".