20423403176 has 48 divisors (see below), whose sum is σ = 42350179200. Its totient is φ = 9226340640.

The previous prime is 20423403157. The next prime is 20423403179. The reversal of 20423403176 is 67130432402.

It is not an unprimeable number, because it can be changed into a prime (20423403179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93065 + ... + 222503.

It is an arithmetic number, because the mean of its divisors is an integer number (882295400).

Almost surely, 2^20423403176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20423403176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21175089600).

20423403176 is an abundant number, since it is smaller than the sum of its proper divisors (21926776024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20423403176 is a wasteful number, since it uses less digits than its factorization.

20423403176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129630 (or 129615 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

Adding to 20423403176 its reverse (67130432402), we get a palindrome (87553835578).

The spelling of 20423403176 in words is "twenty billion, four hundred twenty-three million, four hundred three thousand, one hundred seventy-six".