143231040020 has 96 divisors (see below), whose sum is σ = 315474112800. Its totient is φ = 54553411584.

The previous prime is 143231039969. The next prime is 143231040037. The reversal of 143231040020 is 20040132341.

It can be written as a sum of positive squares in 16 ways, for example, as 126202756 + 143104837264 = 11234^2 + 378292^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 143231039974 and 143231040001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16479836 + ... + 16488524.

It is an arithmetic number, because the mean of its divisors is an integer number (3286188675).

Almost surely, 2^143231040020 is an apocalyptic number.

143231040020 is a gapful number since it is divisible by the number (10) 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 143231040020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157737056400).

143231040020 is an abundant number, since it is smaller than the sum of its proper divisors (172243072780).

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

143231040020 is a wasteful number, since it uses less digits than its factorization.

143231040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9117 (or 9115 counting only the distinct ones).

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

Adding to 143231040020 its reverse (20040132341), we get a palindrome (163271172361).

The spelling of 143231040020 in words is "one hundred forty-three billion, two hundred thirty-one million, forty thousand, twenty".