20431204113 has 8 divisors (see below), whose sum is σ = 27244706368. Its totient is φ = 13619252304.

The previous prime is 20431204109. The next prime is 20431204139. The reversal of 20431204113 is 31140213402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20431204113 - 2² = 20431204109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20431204113.

It is not an unprimeable number, because it can be changed into a prime (20431206113) 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 7 ways as a sum of consecutive naturals, for example, 356506 + ... + 409827.

It is an arithmetic number, because the mean of its divisors is an integer number (3405588296).

Almost surely, 2^20431204113 is an apocalyptic number.

It is an amenable number.

20431204113 is a deficient number, since it is larger than the sum of its proper divisors (6813502255).

20431204113 is an equidigital number, since it uses as much as digits as its factorization.

20431204113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775223.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20431204113 its reverse (31140213402), we get a palindrome (51571417515).

The spelling of 20431204113 in words is "twenty billion, four hundred thirty-one million, two hundred four thousand, one hundred thirteen".