11820131808552 has 80 divisors (see below), whose sum is σ = 33140995287840. Its totient is φ = 3936035541024.

The previous prime is 11820131808523. The next prime is 11820131808571. The reversal of 11820131808552 is 25580813102811.

It is a happy number.

11820131808552 is a `hidden beast` number, since 1 + 1 + 8 + 2 + 0 + 13 + 1 + 80 + 8 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 11820131808498 and 11820131808507.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8641218 + ... + 9915185.

It is an arithmetic number, because the mean of its divisors is an integer number (414262441098).

Almost surely, 2^{11820131808552} is an apocalyptic number.

11820131808552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11820131808552 is an abundant number, since it is smaller than the sum of its proper divisors (21320863479288).

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

11820131808552 is a wasteful number, since it uses less digits than its factorization.

11820131808552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18557404 (or 18557391 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 45.

The spelling of 11820131808552 in words is "eleven trillion, eight hundred twenty billion, one hundred thirty-one million, eight hundred eight thousand, five hundred fifty-two".