21793795140 has 96 divisors (see below), whose sum is σ = 65744703360. Its totient is φ = 5362338816.

The previous prime is 21793795097. The next prime is 21793795141. The reversal of 21793795140 is 4159739712.

It is a self number, because there is not a number n which added to its sum of digits gives 21793795140.

It is not an unprimeable number, because it can be changed into a prime (21793795141) 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 31 ways as a sum of consecutive naturals, for example, 2498667 + ... + 2507373.

It is an arithmetic number, because the mean of its divisors is an integer number (684840660).

Almost surely, 2^21793795140 is an apocalyptic number.

21793795140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21793795140 is an abundant number, since it is smaller than the sum of its proper divisors (43950908220).

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

21793795140 is a wasteful number, since it uses less digits than its factorization.

21793795140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11941 (or 11939 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 48.

The spelling of 21793795140 in words is "twenty-one billion, seven hundred ninety-three million, seven hundred ninety-five thousand, one hundred forty".