11940639231 has 32 divisors (see below), whose sum is σ = 16997257728. Its totient is φ = 7430169600.

The previous prime is 11940639229. The next prime is 11940639233. The reversal of 11940639231 is 13293604911.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11940639229) and next prime (11940639233).

It is not a de Polignac number, because 11940639231 - 2¹ = 11940639229 is a prime.

It is a super-2 number, since 2×11940639231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11940639231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11940639233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7338240 + ... + 7339866.

It is an arithmetic number, because the mean of its divisors is an integer number (531164304).

Almost surely, 2^11940639231 is an apocalyptic number.

11940639231 is a deficient number, since it is larger than the sum of its proper divisors (5056618497).

11940639231 is a wasteful number, since it uses less digits than its factorization.

11940639231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751.

The product of its (nonzero) digits is 34992, while the sum is 39.

The spelling of 11940639231 in words is "eleven billion, nine hundred forty million, six hundred thirty-nine thousand, two hundred thirty-one".