21682480080 has 40 divisors (see below), whose sum is σ = 67215688992. Its totient is φ = 5781994624.

The previous prime is 21682480063. The next prime is 21682480081. The reversal of 21682480080 is 8008428612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21682480081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45171594 + ... + 45172073.

Almost surely, 2^21682480080 is an apocalyptic number.

21682480080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21682480080 is an abundant number, since it is smaller than the sum of its proper divisors (45533208912).

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

21682480080 is a wasteful number, since it uses less digits than its factorization.

21682480080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90343683 (or 90343677 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 39.

The spelling of 21682480080 in words is "twenty-one billion, six hundred eighty-two million, four hundred eighty thousand, eighty".