21279445702859 has 2 divisors, whose sum is σ = 21279445702860. Its totient is φ = 21279445702858.

The previous prime is 21279445702849. The next prime is 21279445702951. The reversal of 21279445702859 is 95820754497212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21279445702859 - 2⁴ = 21279445702843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21279445702795 and 21279445702804.

It is not a weakly prime, because it can be changed into another prime (21279445702849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10639722851429 + 10639722851430.

It is an arithmetic number, because the mean of its divisors is an integer number (10639722851430).

Almost surely, 2^{21279445702859} is an apocalyptic number.

21279445702859 is a deficient number, since it is larger than the sum of its proper divisors (1).

21279445702859 is an equidigital number, since it uses as much as digits as its factorization.

21279445702859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 101606400, while the sum is 65.

The spelling of 21279445702859 in words is "twenty-one trillion, two hundred seventy-nine billion, four hundred forty-five million, seven hundred two thousand, eight hundred fifty-nine".