11013311540 has 96 divisors (see below), whose sum is σ = 29423520000. Its totient is φ = 3432696960.

The previous prime is 11013311509. The next prime is 11013311549. The reversal of 11013311540 is 4511331011.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11013311549) 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, 2486 + ... + 148434.

It is an arithmetic number, because the mean of its divisors is an integer number (306495000).

Almost surely, 2^11013311540 is an apocalyptic number.

11013311540 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 11013311540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14711760000).

11013311540 is an abundant number, since it is smaller than the sum of its proper divisors (18410208460).

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

11013311540 is a wasteful number, since it uses less digits than its factorization.

11013311540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145990 (or 145974 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 11013311540 its reverse (4511331011), we get a palindrome (15524642551).

The spelling of 11013311540 in words is "eleven billion, thirteen million, three hundred eleven thousand, five hundred forty".