20311011389 has 2 divisors, whose sum is σ = 20311011390. Its totient is φ = 20311011388.

The previous prime is 20311011377. The next prime is 20311011397. The reversal of 20311011389 is 98311011302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12306130489 + 8004880900 = 110933^2 + 89470^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311011389 - 2¹² = 20311007293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311013389) 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 as a sum of consecutive naturals, namely, 10155505694 + 10155505695.

It is an arithmetic number, because the mean of its divisors is an integer number (10155505695).

Almost surely, 2^20311011389 is an apocalyptic number.

It is an amenable number.

20311011389 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311011389 is an equidigital number, since it uses as much as digits as its factorization.

20311011389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 20311011389 in words is "twenty billion, three hundred eleven million, eleven thousand, three hundred eighty-nine".