20311030009 has 8 divisors (see below), whose sum is σ = 20868842888. Its totient is φ = 19753683840.

The previous prime is 20311029983. The next prime is 20311030021. The reversal of 20311030009 is 90003011302.

It can be written as a sum of positive squares in 4 ways, for example, as 946915984 + 19364114025 = 30772^2 + 139155^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311030009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311030079) 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, 27522 + ... + 203419.

It is an arithmetic number, because the mean of its divisors is an integer number (2608605361).

Almost surely, 2^20311030009 is an apocalyptic number.

It is an amenable number.

20311030009 is a deficient number, since it is larger than the sum of its proper divisors (557812879).

20311030009 is a wasteful number, since it uses less digits than its factorization.

20311030009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233355.

The product of its (nonzero) digits is 162, while the sum is 19.

The spelling of 20311030009 in words is "twenty billion, three hundred eleven million, thirty thousand, nine".