13021322240 has 88 divisors (see below), whose sum is σ = 31284906912. Its totient is φ = 5200363520.

The previous prime is 13021322233. The next prime is 13021322257. The reversal of 13021322240 is 4222312031.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4079045 + ... + 4082235.

Almost surely, 2^13021322240 is an apocalyptic number.

13021322240 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 13021322240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15642453456).

13021322240 is an abundant number, since it is smaller than the sum of its proper divisors (18263584672).

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

13021322240 is an equidigital number, since it uses as much as digits as its factorization.

13021322240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013 (or 3995 counting only the distinct ones).

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

Adding to 13021322240 its reverse (4222312031), we get a palindrome (17243634271).

The spelling of 13021322240 in words is "thirteen billion, twenty-one million, three hundred twenty-two thousand, two hundred forty".