21794920589 has 16 divisors (see below), whose sum is σ = 25089329664. Its totient is φ = 18774307200.

The previous prime is 21794920573. The next prime is 21794920597. The reversal of 21794920589 is 98502949712.

It is a cyclic number.

It is not a de Polignac number, because 21794920589 - 2⁴ = 21794920573 is a prime.

It is a super-2 number, since 2×21794920589² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794920529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876677 + ... + 901194.

It is an arithmetic number, because the mean of its divisors is an integer number (1568083104).

Almost surely, 2^21794920589 is an apocalyptic number.

It is an amenable number.

21794920589 is a deficient number, since it is larger than the sum of its proper divisors (3294409075).

21794920589 is a wasteful number, since it uses less digits than its factorization.

21794920589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777948.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 21794920589 in words is "twenty-one billion, seven hundred ninety-four million, nine hundred twenty thousand, five hundred eighty-nine".