21036586279 has 2 divisors, whose sum is σ = 21036586280. Its totient is φ = 21036586278.

The previous prime is 21036586273. The next prime is 21036586297. The reversal of 21036586279 is 97268563012.

Together with next prime (21036586297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21036586279 - 2⁵ = 21036586247 is a prime.

It is a super-2 number, since 2×21036586279² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21036586273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10518293139 + 10518293140.

It is an arithmetic number, because the mean of its divisors is an integer number (10518293140).

Almost surely, 2^21036586279 is an apocalyptic number.

21036586279 is a deficient number, since it is larger than the sum of its proper divisors (1).

21036586279 is an equidigital number, since it uses as much as digits as its factorization.

21036586279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 21036586279 in words is "twenty-one billion, thirty-six million, five hundred eighty-six thousand, two hundred seventy-nine".