20342212231 has 16 divisors (see below), whose sum is σ = 23577816960. Its totient is φ = 17355854880.

The previous prime is 20342212211. The next prime is 20342212243. The reversal of 20342212231 is 13221224302.

It is a cyclic number.

It is not a de Polignac number, because 20342212231 - 2⁹ = 20342211719 is a prime.

It is a super-2 number, since 2×20342212231² (a number of 21 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 (20342212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432456 + ... + 477181.

It is an arithmetic number, because the mean of its divisors is an integer number (1473613560).

Almost surely, 2^20342212231 is an apocalyptic number.

20342212231 is a deficient number, since it is larger than the sum of its proper divisors (3235604729).

20342212231 is a wasteful number, since it uses less digits than its factorization.

20342212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909774.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20342212231 its reverse (13221224302), we get a palindrome (33563436533).

The spelling of 20342212231 in words is "twenty billion, three hundred forty-two million, two hundred twelve thousand, two hundred thirty-one".