11868806205 has 32 divisors (see below), whose sum is σ = 21251932800. Its totient is φ = 6284480256.

The previous prime is 11868806189. The next prime is 11868806221. The reversal of 11868806205 is 50260886811.

11868806205 is a `hidden beast` number, since 1 + 18 + 6 + 8 + 8 + 0 + 620 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (11868806189) and next prime (11868806221).

It is not a de Polignac number, because 11868806205 - 2⁴ = 11868806189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297484 + ... + 335013.

It is an arithmetic number, because the mean of its divisors is an integer number (664122900).

Almost surely, 2^11868806205 is an apocalyptic number.

11868806205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11868806205 is a deficient number, since it is larger than the sum of its proper divisors (9383126595).

11868806205 is a wasteful number, since it uses less digits than its factorization.

11868806205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632650 (or 632644 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 11868806205 in words is "eleven billion, eight hundred sixty-eight million, eight hundred six thousand, two hundred five".