320143020 has 24 divisors (see below), whose sum is σ = 896400624. Its totient is φ = 85371456.

The previous prime is 320143013. The next prime is 320143069. The reversal of 320143020 is 20341023.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2667799 + ... + 2667918.

It is an arithmetic number, because the mean of its divisors is an integer number (37350026).

Almost surely, 2^320143020 is an apocalyptic number.

320143020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320143020 is an abundant number, since it is smaller than the sum of its proper divisors (576257604).

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

320143020 is a wasteful number, since it uses less digits than its factorization.

320143020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335729 (or 5335727 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 320143020 is about 17892.5409039633. The cubic root of 320143020 is about 684.0922638100.

Adding to 320143020 its reverse (20341023), we get a palindrome (340484043).

The spelling of 320143020 in words is "three hundred twenty million, one hundred forty-three thousand, twenty".