21560712527 has 2 divisors, whose sum is σ = 21560712528. Its totient is φ = 21560712526.

The previous prime is 21560712499. The next prime is 21560712529. The reversal of 21560712527 is 72521706512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21560712527 - 2¹² = 21560708431 is a prime.

Together with 21560712529, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21560712529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10780356263 + 10780356264.

It is an arithmetic number, because the mean of its divisors is an integer number (10780356264).

Almost surely, 2^21560712527 is an apocalyptic number.

21560712527 is a deficient number, since it is larger than the sum of its proper divisors (1).

21560712527 is an equidigital number, since it uses as much as digits as its factorization.

21560712527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 21560712527 in words is "twenty-one billion, five hundred sixty million, seven hundred twelve thousand, five hundred twenty-seven".