11785636220 has 12 divisors (see below), whose sum is σ = 24749836104. Its totient is φ = 4714254480.

The previous prime is 11785636207. The next prime is 11785636229. The reversal of 11785636220 is 2263658711.

It is a super-2 number, since 2×11785636220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11785636229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294640886 + ... + 294640925.

It is an arithmetic number, because the mean of its divisors is an integer number (2062486342).

Almost surely, 2^11785636220 is an apocalyptic number.

11785636220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11785636220 is an abundant number, since it is smaller than the sum of its proper divisors (12964199884).

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

11785636220 is a wasteful number, since it uses less digits than its factorization.

11785636220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589281820 (or 589281818 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 11785636220 in words is "eleven billion, seven hundred eighty-five million, six hundred thirty-six thousand, two hundred twenty".