20104434131 has 4 divisors (see below), whose sum is σ = 20127894072. Its totient is φ = 20080974192.

The previous prime is 20104434089. The next prime is 20104434169. The reversal of 20104434131 is 13143440102.

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 20104434131 - 2¹⁴ = 20104417747 is a prime.

It is a super-2 number, since 2×20104434131² (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 = 20104434097 and 20104434106.

It is not an unprimeable number, because it can be changed into a prime (20104434331) 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, 11728685 + ... + 11730398.

It is an arithmetic number, because the mean of its divisors is an integer number (5031973518).

Almost surely, 2^20104434131 is an apocalyptic number.

20104434131 is a deficient number, since it is larger than the sum of its proper divisors (23459941).

20104434131 is an equidigital number, since it uses as much as digits as its factorization.

20104434131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23459940.

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

Adding to 20104434131 its reverse (13143440102), we get a palindrome (33247874233).

The spelling of 20104434131 in words is "twenty billion, one hundred four million, four hundred thirty-four thousand, one hundred thirty-one".