21326069279 has 2 divisors, whose sum is σ = 21326069280. Its totient is φ = 21326069278.

The previous prime is 21326069251. The next prime is 21326069291. The reversal of 21326069279 is 97296062312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21326069279 - 2¹² = 21326065183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21326069299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10663034639 + 10663034640.

It is an arithmetic number, because the mean of its divisors is an integer number (10663034640).

Almost surely, 2^21326069279 is an apocalyptic number.

21326069279 is a deficient number, since it is larger than the sum of its proper divisors (1).

21326069279 is an equidigital number, since it uses as much as digits as its factorization.

21326069279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 21326069279 in words is "twenty-one billion, three hundred twenty-six million, sixty-nine thousand, two hundred seventy-nine".