21627530513 has 2 divisors, whose sum is σ = 21627530514. Its totient is φ = 21627530512.

The previous prime is 21627530479. The next prime is 21627530537. The reversal of 21627530513 is 31503572612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20241606529 + 1385923984 = 142273^2 + 37228^2 .

It is a cyclic number.

It is not a de Polignac number, because 21627530513 - 2³² = 17332563217 is a prime.

It is not a weakly prime, because it can be changed into another prime (21627590513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10813765256 + 10813765257.

It is an arithmetic number, because the mean of its divisors is an integer number (10813765257).

Almost surely, 2^21627530513 is an apocalyptic number.

It is an amenable number.

21627530513 is a deficient number, since it is larger than the sum of its proper divisors (1).

21627530513 is an equidigital number, since it uses as much as digits as its factorization.

21627530513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 21627530513 in words is "twenty-one billion, six hundred twenty-seven million, five hundred thirty thousand, five hundred thirteen".