20795957984 has 24 divisors (see below), whose sum is σ = 41613227208. Its totient is φ = 10227519360.

The previous prime is 20795957983. The next prime is 20795957989. The reversal of 20795957984 is 48975959702.

It is a self number, because there is not a number n which added to its sum of digits gives 20795957984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20795957983) 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, 5324882 + ... + 5328785.

It is an arithmetic number, because the mean of its divisors is an integer number (1733884467).

Almost surely, 2^20795957984 is an apocalyptic number.

It is an amenable number.

20795957984 is an abundant number, since it is smaller than the sum of its proper divisors (20817269224).

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

20795957984 is a wasteful number, since it uses less digits than its factorization.

20795957984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10653738 (or 10653730 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 65.

The spelling of 20795957984 in words is "twenty billion, seven hundred ninety-five million, nine hundred fifty-seven thousand, nine hundred eighty-four".