11838687993 has 24 divisors (see below), whose sum is σ = 18673368480. Its totient is φ = 7167860160.

The previous prime is 11838687983. The next prime is 11838688003. The reversal of 11838687993 is 39978683811.

It is an interprime number because it is at equal distance from previous prime (11838687983) and next prime (11838688003).

It is not a de Polignac number, because 11838687993 - 2⁸ = 11838687737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11838687993.

It is not an unprimeable number, because it can be changed into a prime (11838687983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42205 + ... + 159557.

It is an arithmetic number, because the mean of its divisors is an integer number (778057020).

Almost surely, 2^11838687993 is an apocalyptic number.

It is an amenable number.

11838687993 is a deficient number, since it is larger than the sum of its proper divisors (6834680487).

11838687993 is a wasteful number, since it uses less digits than its factorization.

11838687993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118389 (or 118386 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 11838687993 in words is "eleven billion, eight hundred thirty-eight million, six hundred eighty-seven thousand, nine hundred ninety-three".