20042343031 has 4 divisors (see below), whose sum is σ = 20043359632. Its totient is φ = 20041326432.

The previous prime is 20042343023. The next prime is 20042343071. The reversal of 20042343031 is 13034324002.

It is a happy number.

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 20042343031 - 2³ = 20042343023 is a prime.

It is a super-2 number, since 2×20042343031² (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 = 20042342993 and 20042343011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042343071) 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, 478131 + ... + 518356.

It is an arithmetic number, because the mean of its divisors is an integer number (5010839908).

Almost surely, 2^20042343031 is an apocalyptic number.

20042343031 is a deficient number, since it is larger than the sum of its proper divisors (1016601).

20042343031 is an equidigital number, since it uses as much as digits as its factorization.

20042343031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016600.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20042343031 its reverse (13034324002), we get a palindrome (33076667033).

The spelling of 20042343031 in words is "twenty billion, forty-two million, three hundred forty-three thousand, thirty-one".