11812232820 has 48 divisors (see below), whose sum is σ = 34512266880. Its totient is φ = 3012974976.

The previous prime is 11812232767. The next prime is 11812232833. The reversal of 11812232820 is 2823221811.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4278415 + ... + 4281174.

It is an arithmetic number, because the mean of its divisors is an integer number (719005560).

Almost surely, 2^11812232820 is an apocalyptic number.

11812232820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11812232820 is an abundant number, since it is smaller than the sum of its proper divisors (22700034060).

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

11812232820 is a wasteful number, since it uses less digits than its factorization.

11812232820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8559624 (or 8559622 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The spelling of 11812232820 in words is "eleven billion, eight hundred twelve million, two hundred thirty-two thousand, eight hundred twenty".