20404200043 has 4 divisors (see below), whose sum is σ = 20404726920. Its totient is φ = 20403673168.

The previous prime is 20404200007. The next prime is 20404200049. The reversal of 20404200043 is 34000240402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34000240402 = 2 ⋅17000120201.

It is a cyclic number.

It is not a de Polignac number, because 20404200043 - 2³³ = 11814265451 is a prime.

It is a super-2 number, since 2×20404200043² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404200049) 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, 200305 + ... + 284482.

It is an arithmetic number, because the mean of its divisors is an integer number (5101181730).

Almost surely, 2^20404200043 is an apocalyptic number.

20404200043 is a deficient number, since it is larger than the sum of its proper divisors (526877).

20404200043 is an equidigital number, since it uses as much as digits as its factorization.

20404200043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526876.

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20404200043 its reverse (34000240402), we get a palindrome (54404440445).

The spelling of 20404200043 in words is "twenty billion, four hundred four million, two hundred thousand, forty-three".