21794854258 has 8 divisors (see below), whose sum is σ = 32861672028. Its totient is φ = 10840963584.

The previous prime is 21794854157. The next prime is 21794854259. The reversal of 21794854258 is 85245849712.

It can be written as a sum of positive squares in 2 ways, for example, as 21637527409 + 157326849 = 147097^2 + 12543^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21794854199 and 21794854208.

It is not an unprimeable number, because it can be changed into a prime (21794854259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28231291 + ... + 28232062.

Almost surely, 2^21794854258 is an apocalyptic number.

21794854258 is a deficient number, since it is larger than the sum of its proper divisors (11066817770).

21794854258 is a wasteful number, since it uses less digits than its factorization.

21794854258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56463548.

The product of its digits is 6451200, while the sum is 55.

The spelling of 21794854258 in words is "twenty-one billion, seven hundred ninety-four million, eight hundred fifty-four thousand, two hundred fifty-eight".