21767114771 has 2 divisors, whose sum is σ = 21767114772. Its totient is φ = 21767114770.

The previous prime is 21767114749. The next prime is 21767114773. The reversal of 21767114771 is 17741176712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21767114771 - 2³⁴ = 4587245587 is a prime.

Together with 21767114773, 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 (21767114773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10883557385 + 10883557386.

It is an arithmetic number, because the mean of its divisors is an integer number (10883557386).

Almost surely, 2^21767114771 is an apocalyptic number.

21767114771 is a deficient number, since it is larger than the sum of its proper divisors (1).

21767114771 is an equidigital number, since it uses as much as digits as its factorization.

21767114771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115248, while the sum is 44.

The spelling of 21767114771 in words is "twenty-one billion, seven hundred sixty-seven million, one hundred fourteen thousand, seven hundred seventy-one".