21968114813 has 8 divisors (see below), whose sum is σ = 22481398368. Its totient is φ = 21454940304.

The previous prime is 21968114809. The next prime is 21968114827. The reversal of 21968114813 is 31841186912.

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 21968114813 - 2² = 21968114809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21968114513) 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, 496370 + ... + 538812.

It is an arithmetic number, because the mean of its divisors is an integer number (2810174796).

Almost surely, 2^21968114813 is an apocalyptic number.

It is an amenable number.

21968114813 is a deficient number, since it is larger than the sum of its proper divisors (513283555).

21968114813 is a wasteful number, since it uses less digits than its factorization.

21968114813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54523.

The product of its digits is 82944, while the sum is 44.

The spelling of 21968114813 in words is "twenty-one billion, nine hundred sixty-eight million, one hundred fourteen thousand, eight hundred thirteen".