21864130793 has 8 divisors (see below), whose sum is σ = 22209945600. Its totient is φ = 21519567648.

The previous prime is 21864130787. The next prime is 21864130801. The reversal of 21864130793 is 39703146812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21864130793 - 2²⁰ = 21863082217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21864130193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277673 + ... + 347606.

It is an arithmetic number, because the mean of its divisors is an integer number (2776243200).

Almost surely, 2^21864130793 is an apocalyptic number.

It is an amenable number.

21864130793 is a deficient number, since it is larger than the sum of its proper divisors (345814807).

21864130793 is an equidigital number, since it uses as much as digits as its factorization.

21864130793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625831.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 21864130793 in words is "twenty-one billion, eight hundred sixty-four million, one hundred thirty thousand, seven hundred ninety-three".