11321451020 has 48 divisors (see below), whose sum is σ = 26011335168. Its totient is φ = 4104999360.

The previous prime is 11321451013. The next prime is 11321451049. The reversal of 11321451020 is 2015412311.

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

It is a junction number, because it is equal to n+sod(n) for n = 11321450983 and 11321451001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2189 + ... + 150491.

It is an arithmetic number, because the mean of its divisors is an integer number (541902816).

Almost surely, 2^11321451020 is an apocalyptic number.

11321451020 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 11321451020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13005667584).

11321451020 is an abundant number, since it is smaller than the sum of its proper divisors (14689884148).

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

11321451020 is a wasteful number, since it uses less digits than its factorization.

11321451020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148670 (or 148668 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 11321451020 its reverse (2015412311), we get a palindrome (13336863331).

The spelling of 11321451020 in words is "eleven billion, three hundred twenty-one million, four hundred fifty-one thousand, twenty".