20317349899 has 16 divisors (see below), whose sum is σ = 25461987840. Its totient is φ = 15749660160.

The previous prime is 20317349881. The next prime is 20317349947. The reversal of 20317349899 is 99894371302.

It is a cyclic number.

It is not a de Polignac number, because 20317349899 - 2¹⁵ = 20317317131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20317349839) 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, 668719 + ... + 698440.

It is an arithmetic number, because the mean of its divisors is an integer number (1591374240).

Almost surely, 2^20317349899 is an apocalyptic number.

20317349899 is a deficient number, since it is larger than the sum of its proper divisors (5144637941).

20317349899 is a wasteful number, since it uses less digits than its factorization.

20317349899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367370.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 20317349899 in words is "twenty billion, three hundred seventeen million, three hundred forty-nine thousand, eight hundred ninety-nine".