21248426840159 has 2 divisors, whose sum is σ = 21248426840160. Its totient is φ = 21248426840158.

The previous prime is 21248426840149. The next prime is 21248426840261. The reversal of 21248426840159 is 95104862484212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21248426840159 - 2¹⁶ = 21248426774623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21248426840149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10624213420079 + 10624213420080.

It is an arithmetic number, because the mean of its divisors is an integer number (10624213420080).

Almost surely, 2^{21248426840159} is an apocalyptic number.

21248426840159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21248426840159 is an equidigital number, since it uses as much as digits as its factorization.

21248426840159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8847360, while the sum is 56.

The spelling of 21248426840159 in words is "twenty-one trillion, two hundred forty-eight billion, four hundred twenty-six million, eight hundred forty thousand, one hundred fifty-nine".