11993844090 has 16 divisors (see below), whose sum is σ = 28785225888. Its totient is φ = 3198358416.

The previous prime is 11993844073. The next prime is 11993844091. The reversal of 11993844090 is 9044839911.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11993844091) 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, 199897372 + ... + 199897431.

It is an arithmetic number, because the mean of its divisors is an integer number (1799076618).

Almost surely, 2^11993844090 is an apocalyptic number.

11993844090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11993844090 is an abundant number, since it is smaller than the sum of its proper divisors (16791381798).

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

11993844090 is a wasteful number, since it uses less digits than its factorization.

11993844090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399794813.

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 11993844090 in words is "eleven billion, nine hundred ninety-three million, eight hundred forty-four thousand, ninety".