21302732771 has 2 divisors, whose sum is σ = 21302732772. Its totient is φ = 21302732770.

The previous prime is 21302732729. The next prime is 21302732791. The reversal of 21302732771 is 17723720312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302732771 - 2⁶ = 21302732707 is a prime.

It is not a weakly prime, because it can be changed into another prime (21302732791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651366385 + 10651366386.

It is an arithmetic number, because the mean of its divisors is an integer number (10651366386).

Almost surely, 2^21302732771 is an apocalyptic number.

21302732771 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302732771 is an equidigital number, since it uses as much as digits as its factorization.

21302732771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 35.

The spelling of 21302732771 in words is "twenty-one billion, three hundred two million, seven hundred thirty-two thousand, seven hundred seventy-one".