11820013205 has 64 divisors (see below), whose sum is σ = 19509106176. Its totient is φ = 6635520000.

The previous prime is 11820013171. The next prime is 11820013207. The reversal of 11820013205 is 50231002811.

It is a happy number.

It is not a de Polignac number, because 11820013205 - 2⁶ = 11820013141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11820013207) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 176405 + ... + 234005.

It is an arithmetic number, because the mean of its divisors is an integer number (304829784).

Almost surely, 2^11820013205 is an apocalyptic number.

It is an amenable number.

11820013205 is a deficient number, since it is larger than the sum of its proper divisors (7689092971).

11820013205 is a wasteful number, since it uses less digits than its factorization.

11820013205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57678.

The product of its (nonzero) digits is 480, while the sum is 23.

The spelling of 11820013205 in words is "eleven billion, eight hundred twenty million, thirteen thousand, two hundred five".