20311011309 has 8 divisors (see below), whose sum is σ = 27279023040. Its totient is φ = 13441836896.

The previous prime is 20311011283. The next prime is 20311011317. The reversal of 20311011309 is 90311011302.

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 20311011309 - 2⁸ = 20311011053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311011389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24708849 + ... + 24709670.

It is an arithmetic number, because the mean of its divisors is an integer number (3409877880).

Almost surely, 2^20311011309 is an apocalyptic number.

It is an amenable number.

20311011309 is a deficient number, since it is larger than the sum of its proper divisors (6968011731).

20311011309 is a wasteful number, since it uses less digits than its factorization.

20311011309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49418659.

The product of its (nonzero) digits is 162, while the sum is 21.

The spelling of 20311011309 in words is "twenty billion, three hundred eleven million, eleven thousand, three hundred nine".