21583066795 has 4 divisors (see below), whose sum is σ = 25899680160. Its totient is φ = 17266453432.

The previous prime is 21583066793. The next prime is 21583066837. The reversal of 21583066795 is 59766038512.

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 21583066795 - 2¹ = 21583066793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21583066793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158306675 + ... + 2158306684.

It is an arithmetic number, because the mean of its divisors is an integer number (6474920040).

Almost surely, 2^21583066795 is an apocalyptic number.

21583066795 is a deficient number, since it is larger than the sum of its proper divisors (4316613365).

21583066795 is an equidigital number, since it uses as much as digits as its factorization.

21583066795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316613364.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 21583066795 in words is "twenty-one billion, five hundred eighty-three million, sixty-six thousand, seven hundred ninety-five".