21627476539 has 2 divisors, whose sum is σ = 21627476540. Its totient is φ = 21627476538.

The previous prime is 21627476419. The next prime is 21627476561. The reversal of 21627476539 is 93567472612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21627476539 - 2³³ = 13037541947 is a prime.

It is not a weakly prime, because it can be changed into another prime (21627476569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10813738269 + 10813738270.

It is an arithmetic number, because the mean of its divisors is an integer number (10813738270).

Almost surely, 2^21627476539 is an apocalyptic number.

21627476539 is a deficient number, since it is larger than the sum of its proper divisors (1).

21627476539 is an equidigital number, since it uses as much as digits as its factorization.

21627476539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 52.

The spelling of 21627476539 in words is "twenty-one billion, six hundred twenty-seven million, four hundred seventy-six thousand, five hundred thirty-nine".