203143680 has 160 divisors (see below), whose sum is σ = 721828800. Its totient is φ = 54153216.

The previous prime is 203143663. The next prime is 203143723. The reversal of 203143680 is 86341302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67651 + ... + 70589.

It is an arithmetic number, because the mean of its divisors is an integer number (4511430).

Almost surely, 2^203143680 is an apocalyptic number.

203143680 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 203143680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360914400).

203143680 is an abundant number, since it is smaller than the sum of its proper divisors (518685120).

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

203143680 is an equidigital number, since it uses as much as digits as its factorization.

203143680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971 (or 2949 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 203143680 is about 14252.8481364252. The cubic root of 203143680 is about 587.8516910422.

Adding to 203143680 its reverse (86341302), we get a palindrome (289484982).

The spelling of 203143680 in words is "two hundred three million, one hundred forty-three thousand, six hundred eighty".