1103020020 has 36 divisors (see below), whose sum is σ = 3345827940. Its totient is φ = 294138624.

The previous prime is 1103020001. The next prime is 1103020033. The reversal of 1103020020 is 200203011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 498450276 + 604569744 = 22326^2 + 24588^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1103019984 and 1103020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3063765 + ... + 3064124.

It is an arithmetic number, because the mean of its divisors is an integer number (92939665).

Almost surely, 2^1103020020 is an apocalyptic number.

1103020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1103020020 is an abundant number, since it is smaller than the sum of its proper divisors (2242807920).

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

1103020020 is a wasteful number, since it uses less digits than its factorization.

1103020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6127904 (or 6127899 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1103020020 is about 33211.7452115965. The cubic root of 1103020020 is about 1033.2239511922.

Adding to 1103020020 its reverse (200203011), we get a palindrome (1303223031).

The spelling of 1103020020 in words is "one billion, one hundred three million, twenty thousand, twenty".