1020200320 has 32 divisors (see below), whose sum is σ = 2438917920. Its totient is φ = 408079872.

The previous prime is 1020200317. The next prime is 1020200323. The reversal of 1020200320 is 230020201.

It is an interprime number because it is at equal distance from previous prime (1020200317) and next prime (1020200323).

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1020200297 and 1020200306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020200323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796392 + ... + 797671.

It is an arithmetic number, because the mean of its divisors is an integer number (76216185).

Almost surely, 2^1020200320 is an apocalyptic number.

1020200320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020200320 is an abundant number, since it is smaller than the sum of its proper divisors (1418717600).

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

1020200320 is an equidigital number, since it uses as much as digits as its factorization.

1020200320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594082 (or 1594070 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1020200320 is about 31940.5748226296. The cubic root of 1020200320 is about 1006.6886028484.

Adding to 1020200320 its reverse (230020201), we get a palindrome (1250220521).

The spelling of 1020200320 in words is "one billion, twenty million, two hundred thousand, three hundred twenty".