20113210423 has 4 divisors (see below), whose sum is σ = 20132168328. Its totient is φ = 20094252520.

The previous prime is 20113210417. The next prime is 20113210433. The reversal of 20113210423 is 32401231102.

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 20113210423 - 2⁹ = 20113209911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20113210423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113210433) 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, 9477361 + ... + 9479482.

It is an arithmetic number, because the mean of its divisors is an integer number (5033042082).

Almost surely, 2^20113210423 is an apocalyptic number.

20113210423 is a deficient number, since it is larger than the sum of its proper divisors (18957905).

20113210423 is a wasteful number, since it uses less digits than its factorization.

20113210423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18957904.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20113210423 its reverse (32401231102), we get a palindrome (52514441525).

The spelling of 20113210423 in words is "twenty billion, one hundred thirteen million, two hundred ten thousand, four hundred twenty-three".