21846812495671 has 2 divisors, whose sum is σ = 21846812495672. Its totient is φ = 21846812495670.

The previous prime is 21846812495653. The next prime is 21846812495687. The reversal of 21846812495671 is 17659421864812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21846812495671 is a prime.

It is a super-3 number, since 3×21846812495671³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21846812495611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10923406247835 + 10923406247836.

It is an arithmetic number, because the mean of its divisors is an integer number (10923406247836).

Almost surely, 2^{21846812495671} is an apocalyptic number.

21846812495671 is a deficient number, since it is larger than the sum of its proper divisors (1).

21846812495671 is an equidigital number, since it uses as much as digits as its factorization.

21846812495671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46448640, while the sum is 64.

The spelling of 21846812495671 in words is "twenty-one trillion, eight hundred forty-six billion, eight hundred twelve million, four hundred ninety-five thousand, six hundred seventy-one".