11938109920 has 384 divisors, whose sum is σ = 34341801984. Its totient is φ = 3870720000.

The previous prime is 11938109879. The next prime is 11938109987. The reversal of 11938109920 is 2990183911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56578615 + ... + 56578825.

It is an arithmetic number, because the mean of its divisors is an integer number (89431776).

Almost surely, 2^11938109920 is an apocalyptic number.

11938109920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11938109920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17170900992).

11938109920 is an abundant number, since it is smaller than the sum of its proper divisors (22403692064).

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

11938109920 is a wasteful number, since it uses less digits than its factorization.

11938109920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 43.

The spelling of 11938109920 in words is "eleven billion, nine hundred thirty-eight million, one hundred nine thousand, nine hundred twenty".