20111431343 has 4 divisors (see below), whose sum is σ = 20147538600. Its totient is φ = 20075324088.

The previous prime is 20111431309. The next prime is 20111431349. The reversal of 20111431343 is 34313411102.

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 20111431343 - 2⁶ = 20111431279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111431349) 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, 18052793 + ... + 18053906.

It is an arithmetic number, because the mean of its divisors is an integer number (5036884650).

Almost surely, 2^20111431343 is an apocalyptic number.

20111431343 is a deficient number, since it is larger than the sum of its proper divisors (36107257).

20111431343 is an equidigital number, since it uses as much as digits as its factorization.

20111431343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36107256.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20111431343 its reverse (34313411102), we get a palindrome (54424842445).

The spelling of 20111431343 in words is "twenty billion, one hundred eleven million, four hundred thirty-one thousand, three hundred forty-three".