11311045020 has 144 divisors (see below), whose sum is σ = 38636881920. Its totient is φ = 2653603200.

The previous prime is 11311044973. The next prime is 11311045049. The reversal of 11311045020 is 2054011311.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11311044984 and 11311045002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30760 + ... + 153519.

It is an arithmetic number, because the mean of its divisors is an integer number (268311680).

Almost surely, 2^11311045020 is an apocalyptic number.

11311045020 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 11311045020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19318440960).

11311045020 is an abundant number, since it is smaller than the sum of its proper divisors (27325836900).

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

11311045020 is a wasteful number, since it uses less digits than its factorization.

11311045020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184336 (or 184331 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 11311045020 its reverse (2054011311), we get a palindrome (13365056331).

The spelling of 11311045020 in words is "eleven billion, three hundred eleven million, forty-five thousand, twenty".