27407792021 has 2 divisors, whose sum is σ = 27407792022. Its totient is φ = 27407792020.

The previous prime is 27407791993. The next prime is 27407792047. The reversal of 27407792021 is 12029770472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25476628996 + 1931163025 = 159614^2 + 43945^2 .

It is a cyclic number.

It is not a de Polignac number, because 27407792021 - 2¹⁰ = 27407790997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27407792021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27407792051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13703896010 + 13703896011.

It is an arithmetic number, because the mean of its divisors is an integer number (13703896011).

Almost surely, 2^27407792021 is an apocalyptic number.

It is an amenable number.

27407792021 is a deficient number, since it is larger than the sum of its proper divisors (1).

27407792021 is an equidigital number, since it uses as much as digits as its factorization.

27407792021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 41.

The spelling of 27407792021 in words is "twenty-seven billion, four hundred seven million, seven hundred ninety-two thousand, twenty-one".