20434434131 has 4 divisors (see below), whose sum is σ = 20486965200. Its totient is φ = 20381903064.

The previous prime is 20434434109. The next prime is 20434434143. The reversal of 20434434131 is 13143443402.

It is a happy number.

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 20434434131 - 2²⁶ = 20367325267 is a prime.

It is a super-2 number, since 2×20434434131² (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 = 20434434094 and 20434434103.

It is not an unprimeable number, because it can be changed into a prime (20434434151) 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, 26264951 + ... + 26265728.

It is an arithmetic number, because the mean of its divisors is an integer number (5121741300).

Almost surely, 2^20434434131 is an apocalyptic number.

20434434131 is a deficient number, since it is larger than the sum of its proper divisors (52531069).

20434434131 is an equidigital number, since it uses as much as digits as its factorization.

20434434131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52531068.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20434434131 its reverse (13143443402), we get a palindrome (33577877533).

The spelling of 20434434131 in words is "twenty billion, four hundred thirty-four million, four hundred thirty-four thousand, one hundred thirty-one".