1320332420 has 96 divisors (see below), whose sum is σ = 3270395520. Its totient is φ = 442506240.

The previous prime is 1320332417. The next prime is 1320332423. The reversal of 1320332420 is 242330231.

It is an interprime number because it is at equal distance from previous prime (1320332417) and next prime (1320332423).

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 = 1320332392 and 1320332401.

It is not an unprimeable number, because it can be changed into a prime (1320332423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150392 + ... + 158928.

It is an arithmetic number, because the mean of its divisors is an integer number (34066620).

Almost surely, 2^1320332420 is an apocalyptic number.

1320332420 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 1320332420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1635197760).

1320332420 is an abundant number, since it is smaller than the sum of its proper divisors (1950063100).

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

1320332420 is a wasteful number, since it uses less digits than its factorization.

1320332420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8613 (or 8611 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 1320332420 is about 36336.3787408707. The cubic root of 1320332420 is about 1097.0533865655.

Adding to 1320332420 its reverse (242330231), we get a palindrome (1562662651).

The spelling of 1320332420 in words is "one billion, three hundred twenty million, three hundred thirty-two thousand, four hundred twenty".