13543111020 has 96 divisors (see below), whose sum is σ = 38424964032. Its totient is φ = 3563757568.

The previous prime is 13543111003. The next prime is 13543111031. The reversal of 13543111020 is 2011134531.

It is a super-2 number, since 2×13543111020² (a number of 21 digits) contains 22 as substring.

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, 1575454 + ... + 1584026.

It is an arithmetic number, because the mean of its divisors is an integer number (400260042).

Almost surely, 2^13543111020 is an apocalyptic number.

13543111020 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 13543111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19212482016).

13543111020 is an abundant number, since it is smaller than the sum of its proper divisors (24881853012).

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

13543111020 is a wasteful number, since it uses less digits than its factorization.

13543111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8931 (or 8929 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 13543111020 its reverse (2011134531), we get a palindrome (15554245551).

The spelling of 13543111020 in words is "thirteen billion, five hundred forty-three million, one hundred eleven thousand, twenty".