1320032020 has 24 divisors (see below), whose sum is σ = 2775243744. Its totient is φ = 527407776.

The previous prime is 1320031991. The next prime is 1320032027. The reversal of 1320032020 is 202300231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320032027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19714 + ... + 55033.

It is an arithmetic number, because the mean of its divisors is an integer number (115635156).

Almost surely, 2^1320032020 is an apocalyptic number.

1320032020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320032020 is an abundant number, since it is smaller than the sum of its proper divisors (1455211724).

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

1320032020 is a wasteful number, since it uses less digits than its factorization.

1320032020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75639 (or 75637 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1320032020 is about 36332.2449072446. The cubic root of 1320032020 is about 1096.9701802888.

Adding to 1320032020 its reverse (202300231), we get a palindrome (1522332251).

The spelling of 1320032020 in words is "one billion, three hundred twenty million, thirty-two thousand, twenty".