1100200020 has 24 divisors (see below), whose sum is σ = 3080560224. Its totient is φ = 293386656.

The previous prime is 1100200019. The next prime is 1100200039. The reversal of 1100200020 is 200020011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 1100199981 and 1100200008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9168274 + ... + 9168393.

It is an arithmetic number, because the mean of its divisors is an integer number (128356676).

Almost surely, 2^1100200020 is an apocalyptic number.

1100200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100200020 is an abundant number, since it is smaller than the sum of its proper divisors (1980360204).

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

1100200020 is a wasteful number, since it uses less digits than its factorization.

1100200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18336679 (or 18336677 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1100200020 is about 33169.2631814456. The cubic root of 1100200020 is about 1032.3426803518.

Adding to 1100200020 its reverse (200020011), we get a palindrome (1300220031).

Subtracting from 1100200020 its reverse (200020011), we obtain a square (900180009 = 30003²).

The spelling of 1100200020 in words is "one billion, one hundred million, two hundred thousand, twenty".