20213113123031 has 16 divisors (see below), whose sum is σ = 20293514908128. Its totient is φ = 20132885798400.

The previous prime is 20213113122991. The next prime is 20213113123039. The reversal of 20213113123031 is 13032131131202.

It is a cyclic number.

It is not a de Polignac number, because 20213113123031 - 2²⁶ = 20213046014167 is a prime.

It is a super-2 number, since 2×20213113123031² (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 = 20213113122988 and 20213113123006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213113123039) 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, 1932969155 + ... + 1932979611.

It is an arithmetic number, because the mean of its divisors is an integer number (1268344681758).

Almost surely, 2^{20213113123031} is an apocalyptic number.

20213113123031 is a deficient number, since it is larger than the sum of its proper divisors (80401785097).

20213113123031 is a wasteful number, since it uses less digits than its factorization.

20213113123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18082.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 20213113123031 its reverse (13032131131202), we get a palindrome (33245244254233).

The spelling of 20213113123031 in words is "twenty trillion, two hundred thirteen billion, one hundred thirteen million, one hundred twenty-three thousand, thirty-one".