21452577317959 has 2 divisors, whose sum is σ = 21452577317960. Its totient is φ = 21452577317958.

The previous prime is 21452577317917. The next prime is 21452577317981. The reversal of 21452577317959 is 95971377525412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21452577317959 - 2¹³ = 21452577309767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21452577317894 and 21452577317903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21452577317989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10726288658979 + 10726288658980.

It is an arithmetic number, because the mean of its divisors is an integer number (10726288658980).

Almost surely, 2^{21452577317959} is an apocalyptic number.

21452577317959 is a deficient number, since it is larger than the sum of its proper divisors (1).

21452577317959 is an equidigital number, since it uses as much as digits as its factorization.

21452577317959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698000, while the sum is 67.

The spelling of 21452577317959 in words is "twenty-one trillion, four hundred fifty-two billion, five hundred seventy-seven million, three hundred seventeen thousand, nine hundred fifty-nine".