20404241423 has 4 divisors (see below), whose sum is σ = 20662523040. Its totient is φ = 20145959808.

The previous prime is 20404241401. The next prime is 20404241437. The reversal of 20404241423 is 32414240402.

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 20404241423 - 2⁶ = 20404241359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20404241392 and 20404241401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404241443) 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, 129140690 + ... + 129140847.

It is an arithmetic number, because the mean of its divisors is an integer number (5165630760).

Almost surely, 2^20404241423 is an apocalyptic number.

20404241423 is a deficient number, since it is larger than the sum of its proper divisors (258281617).

20404241423 is an equidigital number, since it uses as much as digits as its factorization.

20404241423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258281616.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20404241423 its reverse (32414240402), we get a palindrome (52818481825).

The spelling of 20404241423 in words is "twenty billion, four hundred four million, two hundred forty-one thousand, four hundred twenty-three".