20213110203031 has 16 divisors (see below), whose sum is σ = 20894454782208. Its totient is φ = 19533601785600.

The previous prime is 20213110203017. The next prime is 20213110203047. The reversal of 20213110203031 is 13030201131202.

It is a cyclic number.

It is not a de Polignac number, because 20213110203031 - 2⁷ = 20213110202903 is a prime.

It is a super-2 number, since 2×20213110203031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213110203001) 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, 355754781 + ... + 355811593.

It is an arithmetic number, because the mean of its divisors is an integer number (1305903423888).

Almost surely, 2^{20213110203031} is an apocalyptic number.

20213110203031 is a deficient number, since it is larger than the sum of its proper divisors (681344579177).

20213110203031 is a wasteful number, since it uses less digits than its factorization.

20213110203031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72762.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20213110203031 its reverse (13030201131202), we get a palindrome (33243311334233).

The spelling of 20213110203031 in words is "twenty trillion, two hundred thirteen billion, one hundred ten million, two hundred three thousand, thirty-one".