20104431431 has 12 divisors (see below), whose sum is σ = 23930668872. Its totient is φ = 16831615248.

The previous prime is 20104431419. The next prime is 20104431437. The reversal of 20104431431 is 13413440102.

It is not a de Polignac number, because 20104431431 - 2¹⁰ = 20104430407 is a prime.

It is a super-2 number, since 2×20104431431² (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 = 20104431397 and 20104431406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104431437) 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 11 ways as a sum of consecutive naturals, for example, 4768760 + ... + 4772973.

It is an arithmetic number, because the mean of its divisors is an integer number (1994222406).

Almost surely, 2^20104431431 is an apocalyptic number.

20104431431 is a deficient number, since it is larger than the sum of its proper divisors (3826237441).

20104431431 is an equidigital number, since it uses as much as digits as its factorization.

20104431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9541790 (or 9541783 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20104431431 its reverse (13413440102), we get a palindrome (33517871533).

The spelling of 20104431431 in words is "twenty billion, one hundred four million, four hundred thirty-one thousand, four hundred thirty-one".