21862904258771 has 2 divisors, whose sum is σ = 21862904258772. Its totient is φ = 21862904258770.

The previous prime is 21862904258743. The next prime is 21862904258773. The reversal of 21862904258771 is 17785240926812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21862904258771 is a prime.

Together with 21862904258773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21862904258773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10931452129385 + 10931452129386.

It is an arithmetic number, because the mean of its divisors is an integer number (10931452129386).

Almost surely, 2^{21862904258771} is an apocalyptic number.

21862904258771 is a deficient number, since it is larger than the sum of its proper divisors (1).

21862904258771 is an equidigital number, since it uses as much as digits as its factorization.

21862904258771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 21862904258771 in words is "twenty-one trillion, eight hundred sixty-two billion, nine hundred four million, two hundred fifty-eight thousand, seven hundred seventy-one".