21507532275059 has 2 divisors, whose sum is σ = 21507532275060. Its totient is φ = 21507532275058.

The previous prime is 21507532274951. The next prime is 21507532275079. The reversal of 21507532275059 is 95057223570512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21507532275059 - 2²⁸ = 21507263839603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21507532275059.

It is not a weakly prime, because it can be changed into another prime (21507532275079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10753766137529 + 10753766137530.

It is an arithmetic number, because the mean of its divisors is an integer number (10753766137530).

Almost surely, 2^{21507532275059} is an apocalyptic number.

21507532275059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21507532275059 is an equidigital number, since it uses as much as digits as its factorization.

21507532275059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6615000, while the sum is 53.

The spelling of 21507532275059 in words is "twenty-one trillion, five hundred seven billion, five hundred thirty-two million, two hundred seventy-five thousand, fifty-nine".