13220213240 has 128 divisors (see below), whose sum is σ = 33736348800. Its totient is φ = 4625786880.

The previous prime is 13220213233. The next prime is 13220213261. The reversal of 13220213240 is 4231202231.

It is a super-2 number, since 2×13220213240² (a number of 21 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 1298570 + ... + 1308710.

It is an arithmetic number, because the mean of its divisors is an integer number (263565225).

Almost surely, 2^13220213240 is an apocalyptic number.

13220213240 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 13220213240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16868174400).

13220213240 is an abundant number, since it is smaller than the sum of its proper divisors (20516135560).

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

13220213240 is a wasteful number, since it uses less digits than its factorization.

13220213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10297 (or 10293 counting only the distinct ones).

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

Adding to 13220213240 its reverse (4231202231), we get a palindrome (17451415471).

The spelling of 13220213240 in words is "thirteen billion, two hundred twenty million, two hundred thirteen thousand, two hundred forty".