20323110213031 has 4 divisors (see below), whose sum is σ = 20478248459064. Its totient is φ = 20167971967000.

The previous prime is 20323110212869. The next prime is 20323110213047. The reversal of 20323110213031 is 13031201132302.

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 20323110213031 - 2¹⁷ = 20323110081959 is a prime.

It is a super-2 number, since 2×20323110213031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323110212993 and 20323110213011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323110214031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77569122820 + ... + 77569123081.

It is an arithmetic number, because the mean of its divisors is an integer number (5119562114766).

Almost surely, 2^{20323110213031} is an apocalyptic number.

20323110213031 is a deficient number, since it is larger than the sum of its proper divisors (155138246033).

20323110213031 is a wasteful number, since it uses less digits than its factorization.

20323110213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155138246032.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20323110213031 its reverse (13031201132302), we get a palindrome (33354311345333).

The spelling of 20323110213031 in words is "twenty trillion, three hundred twenty-three billion, one hundred ten million, two hundred thirteen thousand, thirty-one".