20123423200 has 144 divisors (see below), whose sum is σ = 51081199344. Its totient is φ = 7734988800.

The previous prime is 20123423191. The next prime is 20123423207. The reversal of 20123423200 is 232432102.

It is a super-2 number, since 2×20123423200² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123423207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2193022 + ... + 2202178.

It is an arithmetic number, because the mean of its divisors is an integer number (354730551).

Almost surely, 2^20123423200 is an apocalyptic number.

20123423200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123423200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25540599672).

20123423200 is an abundant number, since it is smaller than the sum of its proper divisors (30957776144).

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

20123423200 is a wasteful number, since it uses less digits than its factorization.

20123423200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9285 (or 9272 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20123423200 its reverse (232432102), we get a palindrome (20355855302).

The spelling of 20123423200 in words is "twenty billion, one hundred twenty-three million, four hundred twenty-three thousand, two hundred".