20213110309 has 16 divisors (see below), whose sum is σ = 25373767680. Its totient is φ = 15700014000.

The previous prime is 20213110289. The next prime is 20213110339. The reversal of 20213110309 is 90301131202.

It is a cyclic number.

It is not a de Polignac number, because 20213110309 - 2⁵ = 20213110277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20213110309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213110339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3300817 + ... + 3306934.

It is an arithmetic number, because the mean of its divisors is an integer number (1585860480).

Almost surely, 2^20213110309 is an apocalyptic number.

It is an amenable number.

20213110309 is a deficient number, since it is larger than the sum of its proper divisors (5160657371).

20213110309 is a wasteful number, since it uses less digits than its factorization.

20213110309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6607800.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 20213110309 in words is "twenty billion, two hundred thirteen million, one hundred ten thousand, three hundred nine".