21320020096 has 32 divisors (see below), whose sum is σ = 42985227600. Its totient is φ = 10531570944.

The previous prime is 21320020091. The next prime is 21320020121. The reversal of 21320020096 is 69002002312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 21320020096.

It is not an unprimeable number, because it can be changed into a prime (21320020091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992766 + ... + 1014013.

Almost surely, 2^21320020096 is an apocalyptic number.

It is an amenable number.

21320020096 is an abundant number, since it is smaller than the sum of its proper divisors (21665207504).

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

21320020096 is an equidigital number, since it uses as much as digits as its factorization.

21320020096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006876 (or 2006864 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 21320020096 in words is "twenty-one billion, three hundred twenty million, twenty thousand, ninety-six".