21463696765 has 32 divisors (see below), whose sum is σ = 30402975744. Its totient is φ = 14234987520.

The previous prime is 21463696757. The next prime is 21463696799. The reversal of 21463696765 is 56769636412.

It is a happy number.

It is not a de Polignac number, because 21463696765 - 2³ = 21463696757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2314017 + ... + 2323273.

It is an arithmetic number, because the mean of its divisors is an integer number (950092992).

Almost surely, 2^21463696765 is an apocalyptic number.

It is an amenable number.

21463696765 is a deficient number, since it is larger than the sum of its proper divisors (8939278979).

21463696765 is a wasteful number, since it uses less digits than its factorization.

21463696765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11437.

The product of its digits is 9797760, while the sum is 55.

The spelling of 21463696765 in words is "twenty-one billion, four hundred sixty-three million, six hundred ninety-six thousand, seven hundred sixty-five".