1320240020 has 96 divisors (see below), whose sum is σ = 3185360640. Its totient is φ = 454952960.

The previous prime is 1320240013. The next prime is 1320240029. The reversal of 1320240020 is 200420231.

It is a junction number, because it is equal to n+sod(n) for n = 1320239977 and 1320240004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320240029) 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, 570626 + ... + 572934.

It is an arithmetic number, because the mean of its divisors is an integer number (33180840).

Almost surely, 2^1320240020 is an apocalyptic number.

1320240020 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 1320240020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592680320).

1320240020 is an abundant number, since it is smaller than the sum of its proper divisors (1865120620).

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

1320240020 is a wasteful number, since it uses less digits than its factorization.

1320240020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465 (or 2463 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1320240020 is about 36335.1072655634. The cubic root of 1320240020 is about 1097.0277945009.

Adding to 1320240020 its reverse (200420231), we get a palindrome (1520660251).

The spelling of 1320240020 in words is "one billion, three hundred twenty million, two hundred forty thousand, twenty".