20343104031 has 4 divisors (see below), whose sum is σ = 27124138712. Its totient is φ = 13562069352.

The previous prime is 20343104017. The next prime is 20343104057. The reversal of 20343104031 is 13040134302.

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

It is not a de Polignac number, because 20343104031 - 2⁵ = 20343103999 is a prime.

It is a super-2 number, since 2×20343104031² (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 = 20343103989 and 20343104007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343104011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3390517336 + ... + 3390517341.

It is an arithmetic number, because the mean of its divisors is an integer number (6781034678).

Almost surely, 2^20343104031 is an apocalyptic number.

20343104031 is a deficient number, since it is larger than the sum of its proper divisors (6781034681).

20343104031 is an equidigital number, since it uses as much as digits as its factorization.

20343104031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781034680.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20343104031 its reverse (13040134302), we get a palindrome (33383238333).

The spelling of 20343104031 in words is "twenty billion, three hundred forty-three million, one hundred four thousand, thirty-one".