21422845793 has 8 divisors (see below), whose sum is σ = 21828843528. Its totient is φ = 21019889664.

The previous prime is 21422845757. The next prime is 21422845853. The reversal of 21422845793 is 39754822412.

It can be written as a sum of positive squares in 4 ways, for example, as 104509729 + 21318336064 = 10223^2 + 146008^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21422845793 - 2²² = 21418651489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21422845723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746180 + ... + 774357.

It is an arithmetic number, because the mean of its divisors is an integer number (2728605441).

Almost surely, 2^21422845793 is an apocalyptic number.

It is an amenable number.

21422845793 is a deficient number, since it is larger than the sum of its proper divisors (405997735).

21422845793 is a wasteful number, since it uses less digits than its factorization.

21422845793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520803.

The product of its digits is 967680, while the sum is 47.

The spelling of 21422845793 in words is "twenty-one billion, four hundred twenty-two million, eight hundred forty-five thousand, seven hundred ninety-three".