13035541220 has 72 divisors (see below), whose sum is σ = 29794348584. Its totient is φ = 4788446208.

The previous prime is 13035541201. The next prime is 13035541291. The reversal of 13035541220 is 2214553031.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 827943076 + 12207598144 = 28774^2 + 110488^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 13035541220.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 656072 + ... + 675648.

It is an arithmetic number, because the mean of its divisors is an integer number (413810397).

Almost surely, 2^13035541220 is an apocalyptic number.

13035541220 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 13035541220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14897174292).

13035541220 is an abundant number, since it is smaller than the sum of its proper divisors (16758807364).

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

13035541220 is a wasteful number, since it uses less digits than its factorization.

13035541220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19809 (or 19794 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 13035541220 in words is "thirteen billion, thirty-five million, five hundred forty-one thousand, two hundred twenty".