20042040423 has 32 divisors (see below), whose sum is σ = 27903025152. Its totient is φ = 12781692000.

The previous prime is 20042040407. The next prime is 20042040443. The reversal of 20042040423 is 32404024002.

It is not a de Polignac number, because 20042040423 - 2⁴ = 20042040407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20042040423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042040443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5202448 + ... + 5206298.

It is an arithmetic number, because the mean of its divisors is an integer number (871969536).

Almost surely, 2^20042040423 is an apocalyptic number.

20042040423 is a deficient number, since it is larger than the sum of its proper divisors (7860984729).

20042040423 is a wasteful number, since it uses less digits than its factorization.

20042040423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20042040423 its reverse (32404024002), we get a palindrome (52446064425).

The spelling of 20042040423 in words is "twenty billion, forty-two million, forty thousand, four hundred twenty-three".