1105520020 has 96 divisors (see below), whose sum is σ = 2634508800. Its totient is φ = 385996800.

The previous prime is 1105520011. The next prime is 1105520051. The reversal of 1105520020 is 200255011.

It is a junction number, because it is equal to n+sod(n) for n = 1105519976 and 1105520003.

It is a congruent number.

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, 1537221 + ... + 1537939.

It is an arithmetic number, because the mean of its divisors is an integer number (27442800).

Almost surely, 2^1105520020 is an apocalyptic number.

1105520020 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 1105520020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317254400).

1105520020 is an abundant number, since it is smaller than the sum of its proper divisors (1528988780).

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

1105520020 is a wasteful number, since it uses less digits than its factorization.

1105520020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1105520020 is about 33249.3611968711. The cubic root of 1105520020 is about 1034.0039644827.

Adding to 1105520020 its reverse (200255011), we get a palindrome (1305775031).

It can be divided in two parts, 1105 and 520020, that added together give a palindrome (521125).

The spelling of 1105520020 in words is "one billion, one hundred five million, five hundred twenty thousand, twenty".