11831502420 has 36 divisors (see below), whose sum is σ = 35888891220. Its totient is φ = 3155067264.

The previous prime is 11831502379. The next prime is 11831502433. The reversal of 11831502420 is 2420513811.

11831502420 is a `hidden beast` number, since 11 + 83 + 150 + 2 + 420 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2519638416 + 9311864004 = 50196^2 + 96498^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32865105 + ... + 32865464.

It is an arithmetic number, because the mean of its divisors is an integer number (996913645).

Almost surely, 2^11831502420 is an apocalyptic number.

11831502420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11831502420 is an abundant number, since it is smaller than the sum of its proper divisors (24057388800).

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

11831502420 is a wasteful number, since it uses less digits than its factorization.

11831502420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65730584 (or 65730579 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 11831502420 in words is "eleven billion, eight hundred thirty-one million, five hundred two thousand, four hundred twenty".