11809605203 has 24 divisors (see below), whose sum is σ = 14115943296. Its totient is φ = 9831317760.

The previous prime is 11809605163. The next prime is 11809605239. The reversal of 11809605203 is 30250690811.

It is not a de Polignac number, because 11809605203 - 2¹⁰ = 11809604179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11809605103) by changing a digit.

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, 1475 + ... + 153692.

It is an arithmetic number, because the mean of its divisors is an integer number (588164304).

Almost surely, 2^11809605203 is an apocalyptic number.

11809605203 is a deficient number, since it is larger than the sum of its proper divisors (2306338093).

11809605203 is a wasteful number, since it uses less digits than its factorization.

11809605203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155243 (or 155232 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 11809605203 in words is "eleven billion, eight hundred nine million, six hundred five thousand, two hundred three".