11993904444 has 24 divisors (see below), whose sum is σ = 28460113920. Its totient is φ = 3930205744.

The previous prime is 11993904427. The next prime is 11993904449. The reversal of 11993904444 is 44440939911.

It is a junction number, because it is equal to n+sod(n) for n = 11993904393 and 11993904402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11993904449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8469564 + ... + 8470979.

It is an arithmetic number, because the mean of its divisors is an integer number (1185838080).

Almost surely, 2^11993904444 is an apocalyptic number.

It is an amenable number.

11993904444 is an abundant number, since it is smaller than the sum of its proper divisors (16466209476).

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

11993904444 is a wasteful number, since it uses less digits than its factorization.

11993904444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16940609 (or 16940607 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 11993904444 in words is "eleven billion, nine hundred ninety-three million, nine hundred four thousand, four hundred forty-four".