1103312020 has 12 divisors (see below), whose sum is σ = 2316955284. Its totient is φ = 441324800.

The previous prime is 1103312003. The next prime is 1103312027. The reversal of 1103312020 is 202133011.

It can be written as a sum of positive squares in 2 ways, for example, as 368793616 + 734518404 = 19204^2 + 27102^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103312027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27582781 + ... + 27582820.

It is an arithmetic number, because the mean of its divisors is an integer number (193079607).

Almost surely, 2^1103312020 is an apocalyptic number.

1103312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1103312020 is an abundant number, since it is smaller than the sum of its proper divisors (1213643264).

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

1103312020 is a wasteful number, since it uses less digits than its factorization.

1103312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55165610 (or 55165608 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1103312020 is about 33216.1409558666. The cubic root of 1103312020 is about 1033.3151174960.

Adding to 1103312020 its reverse (202133011), we get a palindrome (1305445031).

The spelling of 1103312020 in words is "one billion, one hundred three million, three hundred twelve thousand, twenty".