21794854259 has 2 divisors, whose sum is σ = 21794854260. Its totient is φ = 21794854258.

The previous prime is 21794854157. The next prime is 21794854297. The reversal of 21794854259 is 95245849712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21794854259 - 2²⁴ = 21778077043 is a prime.

It is not a weakly prime, because it can be changed into another prime (21794854559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10897427129 + 10897427130.

It is an arithmetic number, because the mean of its divisors is an integer number (10897427130).

Almost surely, 2^21794854259 is an apocalyptic number.

21794854259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21794854259 is an equidigital number, since it uses as much as digits as its factorization.

21794854259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 56.

The spelling of 21794854259 in words is "twenty-one billion, seven hundred ninety-four million, eight hundred fifty-four thousand, two hundred fifty-nine".