2103823566 has 48 divisors (see below), whose sum is σ = 4924876320. Its totient is φ = 645226560.

The previous prime is 2103823549. The next prime is 2103823577. The reversal of 2103823566 is 6653283012.

It is a happy number.

2103823566 is a `hidden beast` number, since 2 + 10 + 3 + 82 + 3 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2103823566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58320 + ... + 87228.

It is an arithmetic number, because the mean of its divisors is an integer number (102601590).

Almost surely, 2^2103823566 is an apocalyptic number.

2103823566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2103823566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2462438160).

2103823566 is an abundant number, since it is smaller than the sum of its proper divisors (2821052754).

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

2103823566 is a wasteful number, since it uses less digits than its factorization.

2103823566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29241 (or 29238 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2103823566 is about 45867.4565024048. The cubic root of 2103823566 is about 1281.3558967765.

The spelling of 2103823566 in words is "two billion, one hundred three million, eight hundred twenty-three thousand, five hundred sixty-six".