21968080080 has 80 divisors (see below), whose sum is σ = 68169029760. Its totient is φ = 5852306944.

The previous prime is 21968080063. The next prime is 21968080111. The reversal of 21968080080 is 8008086912.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197941 + ... + 288299.

It is an arithmetic number, because the mean of its divisors is an integer number (852112872).

Almost surely, 2^21968080080 is an apocalyptic number.

21968080080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21968080080 is an abundant number, since it is smaller than the sum of its proper divisors (46200949680).

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

21968080080 is a wasteful number, since it uses less digits than its factorization.

21968080080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91388 (or 91382 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The spelling of 21968080080 in words is "twenty-one billion, nine hundred sixty-eight million, eighty thousand, eighty".