21723939168763 has 16 divisors (see below), whose sum is σ = 24362012404800. Its totient is φ = 19233167587200.

The previous prime is 21723939168751. The next prime is 21723939168793. The reversal of 21723939168763 is 36786193932712.

It is a cyclic number.

It is not a de Polignac number, because 21723939168763 - 2⁵ = 21723939168731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21723939168793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190748308 + ... + 190862161.

It is an arithmetic number, because the mean of its divisors is an integer number (1522625775300).

Almost surely, 2^{21723939168763} is an apocalyptic number.

21723939168763 is a deficient number, since it is larger than the sum of its proper divisors (2638073236037).

21723939168763 is a wasteful number, since it uses less digits than its factorization.

21723939168763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381610662.

The product of its digits is 123451776, while the sum is 67.

The spelling of 21723939168763 in words is "twenty-one trillion, seven hundred twenty-three billion, nine hundred thirty-nine million, one hundred sixty-eight thousand, seven hundred sixty-three".