20043500131 has 4 divisors (see below), whose sum is σ = 20044099152. Its totient is φ = 20042901112.

The previous prime is 20043500129. The next prime is 20043500143. The reversal of 20043500131 is 13100534002.

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 20043500131 - 2¹ = 20043500129 is a prime.

It is a super-2 number, since 2×20043500131² (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 = 20043500099 and 20043500108.

It is not an unprimeable number, because it can be changed into a prime (20043500171) 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, 246151 + ... + 317296.

It is an arithmetic number, because the mean of its divisors is an integer number (5011024788).

Almost surely, 2^20043500131 is an apocalyptic number.

20043500131 is a deficient number, since it is larger than the sum of its proper divisors (599021).

20043500131 is an equidigital number, since it uses as much as digits as its factorization.

20043500131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599020.

The product of its (nonzero) digits is 360, while the sum is 19.

The spelling of 20043500131 in words is "twenty billion, forty-three million, five hundred thousand, one hundred thirty-one".