20213311311323 has 16 divisors (see below), whose sum is σ = 21854995247232. Its totient is φ = 18584173440000.

The previous prime is 20213311311299. The next prime is 20213311311331. The reversal of 20213311311323 is 32311311331202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213311311323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213311311292 and 20213311311301.

It is not an unprimeable number, because it can be changed into a prime (20213311311373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366083 + ... + 6368723.

It is an arithmetic number, because the mean of its divisors is an integer number (1365937202952).

Almost surely, 2^{20213311311323} is an apocalyptic number.

20213311311323 is a deficient number, since it is larger than the sum of its proper divisors (1641683935909).

20213311311323 is a wasteful number, since it uses less digits than its factorization.

20213311311323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6003686.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 20213311311323 its reverse (32311311331202), we get a palindrome (52524622642525).

The spelling of 20213311311323 in words is "twenty trillion, two hundred thirteen billion, three hundred eleven million, three hundred eleven thousand, three hundred twenty-three".