11819408220 has 84 divisors (see below), whose sum is σ = 37214157960. Its totient is φ = 3151838304.

The previous prime is 11819408203. The next prime is 11819408233. The reversal of 11819408220 is 2280491811.

It is a happy number.

11819408220 is a `hidden beast` number, since 1 + 18 + 19 + 408 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 390750 + ... + 419909.

It is an arithmetic number, because the mean of its divisors is an integer number (443025690).

Almost surely, 2^11819408220 is an apocalyptic number.

11819408220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11819408220 is an abundant number, since it is smaller than the sum of its proper divisors (25394749740).

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

11819408220 is an equidigital number, since it uses as much as digits as its factorization.

11819408220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810686 (or 810669 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 11819408220 in words is "eleven billion, eight hundred nineteen million, four hundred eight thousand, two hundred twenty".