20941322689 has 4 divisors (see below), whose sum is σ = 23932940224. Its totient is φ = 17949705156.

The previous prime is 20941322657. The next prime is 20941322713. The reversal of 20941322689 is 98622314902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20941322689 - 2⁵ = 20941322657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20941322189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495808757 + ... + 1495808770.

It is an arithmetic number, because the mean of its divisors is an integer number (5983235056).

Almost surely, 2^20941322689 is an apocalyptic number.

It is an amenable number.

20941322689 is a deficient number, since it is larger than the sum of its proper divisors (2991617535).

20941322689 is an equidigital number, since it uses as much as digits as its factorization.

20941322689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991617534.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 20941322689 in words is "twenty billion, nine hundred forty-one million, three hundred twenty-two thousand, six hundred eighty-nine".