11971832431 has 8 divisors (see below), whose sum is σ = 12958190784. Its totient is φ = 10994823840.

The previous prime is 11971832413. The next prime is 11971832437. The reversal of 11971832431 is 13423817911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11971832431 is a prime.

It is a super-2 number, since 2×11971832431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971832437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2334775 + ... + 2339896.

It is an arithmetic number, because the mean of its divisors is an integer number (1619773848).

Almost surely, 2^11971832431 is an apocalyptic number.

11971832431 is a deficient number, since it is larger than the sum of its proper divisors (986358353).

11971832431 is a wasteful number, since it uses less digits than its factorization.

11971832431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4674881.

The product of its digits is 36288, while the sum is 40.

The spelling of 11971832431 in words is "eleven billion, nine hundred seventy-one million, eight hundred thirty-two thousand, four hundred thirty-one".