21652405602299 has 2 divisors, whose sum is σ = 21652405602300. Its totient is φ = 21652405602298.

The previous prime is 21652405602181. The next prime is 21652405602323. The reversal of 21652405602299 is 99220650425612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21652405602299 - 2³⁶ = 21583686125563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21652405602299.

It is not a weakly prime, because it can be changed into another prime (21652405652299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10826202801149 + 10826202801150.

It is an arithmetic number, because the mean of its divisors is an integer number (10826202801150).

Almost surely, 2^{21652405602299} is an apocalyptic number.

21652405602299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21652405602299 is an equidigital number, since it uses as much as digits as its factorization.

21652405602299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 21652405602299 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred five million, six hundred two thousand, two hundred ninety-nine".