21828774395 has 4 divisors (see below), whose sum is σ = 26194529280. Its totient is φ = 17463019512.

The previous prime is 21828774389. The next prime is 21828774413. The reversal of 21828774395 is 59347782812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21828774395 - 2¹⁴ = 21828758011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21828774395.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2182877435 + ... + 2182877444.

It is an arithmetic number, because the mean of its divisors is an integer number (6548632320).

Almost surely, 2^21828774395 is an apocalyptic number.

21828774395 is a deficient number, since it is larger than the sum of its proper divisors (4365754885).

21828774395 is an equidigital number, since it uses as much as digits as its factorization.

21828774395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365754884.

The product of its digits is 6773760, while the sum is 56.

The spelling of 21828774395 in words is "twenty-one billion, eight hundred twenty-eight million, seven hundred seventy-four thousand, three hundred ninety-five".