13351321020 has 96 divisors (see below), whose sum is σ = 39495859200. Its totient is φ = 3364420864.

The previous prime is 13351321013. The next prime is 13351321021. The reversal of 13351321020 is 2012315331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13351321021) 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, 151 + ... + 163409.

It is an arithmetic number, because the mean of its divisors is an integer number (411415200).

Almost surely, 2^13351321020 is an apocalyptic number.

13351321020 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 13351321020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19747929600).

13351321020 is an abundant number, since it is smaller than the sum of its proper divisors (26144538180).

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

13351321020 is a wasteful number, since it uses less digits than its factorization.

13351321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163347 (or 163345 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 13351321020 its reverse (2012315331), we get a palindrome (15363636351).

The spelling of 13351321020 in words is "thirteen billion, three hundred fifty-one million, three hundred twenty-one thousand, twenty".