20311300423 has 4 divisors (see below), whose sum is σ = 20338346848. Its totient is φ = 20284254000.

The previous prime is 20311300393. The next prime is 20311300433. The reversal of 20311300423 is 32400311302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32400311302 = 2 ⋅16200155651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311300423 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 20311300423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311300433) 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 3 ways as a sum of consecutive naturals, for example, 13522086 + ... + 13523587.

It is an arithmetic number, because the mean of its divisors is an integer number (5084586712).

Almost surely, 2^20311300423 is an apocalyptic number.

20311300423 is a deficient number, since it is larger than the sum of its proper divisors (27046425).

20311300423 is an equidigital number, since it uses as much as digits as its factorization.

20311300423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27046424.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20311300423 its reverse (32400311302), we get a palindrome (52711611725).

The spelling of 20311300423 in words is "twenty billion, three hundred eleven million, three hundred thousand, four hundred twenty-three".