20135326231 has 2 divisors, whose sum is σ = 20135326232. Its totient is φ = 20135326230.

The previous prime is 20135326223. The next prime is 20135326249. The reversal of 20135326231 is 13262353102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20135326231 - 2³ = 20135326223 is a prime.

It is a super-2 number, since 2×20135326231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20135326231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20135327231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067663115 + 10067663116.

It is an arithmetic number, because the mean of its divisors is an integer number (10067663116).

Almost surely, 2^20135326231 is an apocalyptic number.

20135326231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20135326231 is an equidigital number, since it uses as much as digits as its factorization.

20135326231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 20135326231 its reverse (13262353102), we get a palindrome (33397679333).

The spelling of 20135326231 in words is "twenty billion, one hundred thirty-five million, three hundred twenty-six thousand, two hundred thirty-one".