20213323231 has 2 divisors, whose sum is σ = 20213323232. Its totient is φ = 20213323230.

The previous prime is 20213323201. The next prime is 20213323237. The reversal of 20213323231 is 13232331202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20213323231 - 2⁷ = 20213323103 is a prime.

It is a super-2 number, since 2×20213323231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213323237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106661615 + 10106661616.

It is an arithmetic number, because the mean of its divisors is an integer number (10106661616).

Almost surely, 2^20213323231 is an apocalyptic number.

20213323231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213323231 is an equidigital number, since it uses as much as digits as its factorization.

20213323231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20213323231 its reverse (13232331202), we get a palindrome (33445654433).

The spelling of 20213323231 in words is "twenty billion, two hundred thirteen million, three hundred twenty-three thousand, two hundred thirty-one".