21586822027 has 2 divisors, whose sum is σ = 21586822028. Its totient is φ = 21586822026.

The previous prime is 21586821979. The next prime is 21586822039. The reversal of 21586822027 is 72022868512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21586822027 - 2³¹ = 19439338379 is a prime.

It is not a weakly prime, because it can be changed into another prime (21586822057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10793411013 + 10793411014.

It is an arithmetic number, because the mean of its divisors is an integer number (10793411014).

Almost surely, 2^21586822027 is an apocalyptic number.

21586822027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21586822027 is an equidigital number, since it uses as much as digits as its factorization.

21586822027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 21586822027 in words is "twenty-one billion, five hundred eighty-six million, eight hundred twenty-two thousand, twenty-seven".