13321372620 has 96 divisors (see below), whose sum is σ = 38231294976. Its totient is φ = 3464204800.

The previous prime is 13321372591. The next prime is 13321372627. The reversal of 13321372620 is 2627312331.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (13321372627) 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, 784015 + ... + 800825.

It is an arithmetic number, because the mean of its divisors is an integer number (398242656).

Almost surely, 2^13321372620 is an apocalyptic number.

13321372620 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 13321372620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19115647488).

13321372620 is an abundant number, since it is smaller than the sum of its proper divisors (24909922356).

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

13321372620 is a wasteful number, since it uses less digits than its factorization.

13321372620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17151 (or 17149 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

Adding to 13321372620 its reverse (2627312331), we get a palindrome (15948684951).

The spelling of 13321372620 in words is "thirteen billion, three hundred twenty-one million, three hundred seventy-two thousand, six hundred twenty".