21452679379 has 2 divisors, whose sum is σ = 21452679380. Its totient is φ = 21452679378.

The previous prime is 21452679331. The next prime is 21452679383. The reversal of 21452679379 is 97397625412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21452679379 - 2⁷ = 21452679251 is a prime.

It is not a weakly prime, because it can be changed into another prime (21452679319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10726339689 + 10726339690.

It is an arithmetic number, because the mean of its divisors is an integer number (10726339690).

Almost surely, 2^21452679379 is an apocalyptic number.

21452679379 is a deficient number, since it is larger than the sum of its proper divisors (1).

21452679379 is an equidigital number, since it uses as much as digits as its factorization.

21452679379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 55.

The spelling of 21452679379 in words is "twenty-one billion, four hundred fifty-two million, six hundred seventy-nine thousand, three hundred seventy-nine".