1320021344 has 24 divisors (see below), whose sum is σ = 2610254808. Its totient is φ = 657099520.

The previous prime is 1320021343. The next prime is 1320021397. The reversal of 1320021344 is 4431200231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320021341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83597 + ... + 98124.

It is an arithmetic number, because the mean of its divisors is an integer number (108760617).

Almost surely, 2^1320021344 is an apocalyptic number.

It is an amenable number.

1320021344 is a deficient number, since it is larger than the sum of its proper divisors (1290233464).

1320021344 is a wasteful number, since it uses less digits than its factorization.

1320021344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181958 (or 181950 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1320021344 is about 36332.0979851150. The cubic root of 1320021344 is about 1096.9672229653.

Adding to 1320021344 its reverse (4431200231), we get a palindrome (5751221575).

The spelling of 1320021344 in words is "one billion, three hundred twenty million, twenty-one thousand, three hundred forty-four".