20231143400 has 96 divisors (see below), whose sum is σ = 50693109600. Its totient is φ = 7464441600.

The previous prime is 20231143393. The next prime is 20231143409. The reversal of 20231143400 is 434113202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20231143409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5663615 + ... + 5667185.

It is an arithmetic number, because the mean of its divisors is an integer number (528053225).

Almost surely, 2^20231143400 is an apocalyptic number.

20231143400 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 20231143400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25346554800).

20231143400 is an abundant number, since it is smaller than the sum of its proper divisors (30461966200).

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

20231143400 is a wasteful number, since it uses less digits than its factorization.

20231143400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779 (or 5770 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20231143400 its reverse (434113202), we get a palindrome (20665256602).

The spelling of 20231143400 in words is "twenty billion, two hundred thirty-one million, one hundred forty-three thousand, four hundred".