21286298705 has 16 divisors (see below), whose sum is σ = 29306240640. Its totient is φ = 14539517952.

The previous prime is 21286298669. The next prime is 21286298713. The reversal of 21286298705 is 50789268212.

It is a cyclic number.

It is not a de Polignac number, because 21286298705 - 2¹⁴ = 21286282321 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174235 + ... + 1192224.

It is an arithmetic number, because the mean of its divisors is an integer number (1831640040).

Almost surely, 2^21286298705 is an apocalyptic number.

It is an amenable number.

21286298705 is a deficient number, since it is larger than the sum of its proper divisors (8019941935).

21286298705 is a wasteful number, since it uses less digits than its factorization.

21286298705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366728.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 21286298705 in words is "twenty-one billion, two hundred eighty-six million, two hundred ninety-eight thousand, seven hundred five".