21726700732531 has 2 divisors, whose sum is σ = 21726700732532. Its totient is φ = 21726700732530.

The previous prime is 21726700732523. The next prime is 21726700732579. The reversal of 21726700732531 is 13523700762712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21726700732531 - 2³ = 21726700732523 is a prime.

It is a super-2 number, since 2×21726700732531² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21726700732931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10863350366265 + 10863350366266.

It is an arithmetic number, because the mean of its divisors is an integer number (10863350366266).

Almost surely, 2^{21726700732531} is an apocalyptic number.

21726700732531 is a deficient number, since it is larger than the sum of its proper divisors (1).

21726700732531 is an equidigital number, since it uses as much as digits as its factorization.

21726700732531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 46.

The spelling of 21726700732531 in words is "twenty-one trillion, seven hundred twenty-six billion, seven hundred million, seven hundred thirty-two thousand, five hundred thirty-one".