21790959289 has 8 divisors (see below), whose sum is σ = 23945475168. Its totient is φ = 19665363360.

The previous prime is 21790959241. The next prime is 21790959293. The reversal of 21790959289 is 98295909712.

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 21790959289 - 2¹¹ = 21790957241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21790950289) 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 7 ways as a sum of consecutive naturals, for example, 7228407 + ... + 7231420.

It is an arithmetic number, because the mean of its divisors is an integer number (2993184396).

Almost surely, 2^21790959289 is an apocalyptic number.

It is an amenable number.

21790959289 is a deficient number, since it is larger than the sum of its proper divisors (2154515879).

21790959289 is a wasteful number, since it uses less digits than its factorization.

21790959289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14459975.

The product of its (nonzero) digits is 7348320, while the sum is 61.

The spelling of 21790959289 in words is "twenty-one billion, seven hundred ninety million, nine hundred fifty-nine thousand, two hundred eighty-nine".