20342213431 has 4 divisors (see below), whose sum is σ = 20344937200. Its totient is φ = 20339489664.

The previous prime is 20342213429. The next prime is 20342213459. The reversal of 20342213431 is 13431224302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20342213431 - 2¹ = 20342213429 is a prime.

It is a super-2 number, since 2×20342213431² (a number of 21 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 = 20342213396 and 20342213405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342211431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350651 + ... + 1365628.

It is an arithmetic number, because the mean of its divisors is an integer number (5086234300).

Almost surely, 2^20342213431 is an apocalyptic number.

20342213431 is a deficient number, since it is larger than the sum of its proper divisors (2723769).

20342213431 is an equidigital number, since it uses as much as digits as its factorization.

20342213431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723768.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20342213431 its reverse (13431224302), we get a palindrome (33773437733).

The spelling of 20342213431 in words is "twenty billion, three hundred forty-two million, two hundred thirteen thousand, four hundred thirty-one".