20722984280 has 32 divisors (see below), whose sum is σ = 47150618400. Its totient is φ = 8196055296.

The previous prime is 20722984279. The next prime is 20722984297. The reversal of 20722984280 is 8248922702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2906972 + ... + 2914091.

It is an arithmetic number, because the mean of its divisors is an integer number (1473456825).

Almost surely, 2^20722984280 is an apocalyptic number.

20722984280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20722984280 is an abundant number, since it is smaller than the sum of its proper divisors (26427634120).

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

20722984280 is a wasteful number, since it uses less digits than its factorization.

20722984280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821163 (or 5821159 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 20722984280 in words is "twenty billion, seven hundred twenty-two million, nine hundred eighty-four thousand, two hundred eighty".