1320003621623 has 8 divisors (see below), whose sum is σ = 1335635661360. Its totient is φ = 1304412883200.

The previous prime is 1320003621619. The next prime is 1320003621647. The reversal of 1320003621623 is 3261263000231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320003621623 - 2² = 1320003621619 is a prime.

It is a super-2 number, since 2×1320003621623² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320003624623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10261028 + ... + 10388873.

It is an arithmetic number, because the mean of its divisors is an integer number (166954457670).

Almost surely, 2^{1320003621623} is an apocalyptic number.

1320003621623 is a deficient number, since it is larger than the sum of its proper divisors (15632039737).

1320003621623 is an equidigital number, since it uses as much as digits as its factorization.

1320003621623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20650657.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 1320003621623 its reverse (3261263000231), we get a palindrome (4581266621854).

The spelling of 1320003621623 in words is "one trillion, three hundred twenty billion, three million, six hundred twenty-one thousand, six hundred twenty-three".