20623106311 has 4 divisors (see below), whose sum is σ = 20742315192. Its totient is φ = 20503897432.

The previous prime is 20623106291. The next prime is 20623106333. The reversal of 20623106311 is 11360132602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20623106311 - 2⁵ = 20623106279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623106381) 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 in 3 ways as a sum of consecutive naturals, for example, 59604181 + ... + 59604526.

It is an arithmetic number, because the mean of its divisors is an integer number (5185578798).

Almost surely, 2^20623106311 is an apocalyptic number.

20623106311 is a deficient number, since it is larger than the sum of its proper divisors (119208881).

20623106311 is a wasteful number, since it uses less digits than its factorization.

20623106311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119208880.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 20623106311 its reverse (11360132602), we get a palindrome (31983238913).

The spelling of 20623106311 in words is "twenty billion, six hundred twenty-three million, one hundred six thousand, three hundred eleven".