11885009731 has 24 divisors (see below), whose sum is σ = 13896866304. Its totient is φ = 10134673920.

The previous prime is 11885009687. The next prime is 11885009749. The reversal of 11885009731 is 13790058811.

11885009731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11885009731 - 2²⁵ = 11851455299 is a prime.

It is a super-2 number, since 2×11885009731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11885009761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12629721 + ... + 12630661.

It is an arithmetic number, because the mean of its divisors is an integer number (579036096).

Almost surely, 2^11885009731 is an apocalyptic number.

11885009731 is a deficient number, since it is larger than the sum of its proper divisors (2011856573).

11885009731 is an equidigital number, since it uses as much as digits as its factorization.

11885009731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011 (or 2004 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 43.

The spelling of 11885009731 in words is "eleven billion, eight hundred eighty-five million, nine thousand, seven hundred thirty-one".