20110442423 has 4 divisors (see below), whose sum is σ = 20135240328. Its totient is φ = 20085644520.

The previous prime is 20110442411. The next prime is 20110442489. The reversal of 20110442423 is 32424401102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110442423 is a prime.

It is a super-2 number, since 2×20110442423² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110442323) 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, 12397736 + ... + 12399357.

It is an arithmetic number, because the mean of its divisors is an integer number (5033810082).

Almost surely, 2^20110442423 is an apocalyptic number.

20110442423 is a deficient number, since it is larger than the sum of its proper divisors (24797905).

20110442423 is an equidigital number, since it uses as much as digits as its factorization.

20110442423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24797904.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20110442423 its reverse (32424401102), we get a palindrome (52534843525).

The spelling of 20110442423 in words is "twenty billion, one hundred ten million, four hundred forty-two thousand, four hundred twenty-three".