31681418614 has 8 divisors (see below), whose sum is σ = 47641832208. Its totient is φ = 15800807880.

The previous prime is 31681418597. The next prime is 31681418641. The reversal of 31681418614 is 41681418613.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19949722 + ... + 19951309.

It is an arithmetic number, because the mean of its divisors is an integer number (5955229026).

Almost surely, 2^31681418614 is an apocalyptic number.

31681418614 is a deficient number, since it is larger than the sum of its proper divisors (15960413594).

31681418614 is a wasteful number, since it uses less digits than its factorization.

31681418614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39901430.

The product of its digits is 110592, while the sum is 43.

Subtracting 31681418614 from its reverse (41681418613), we obtain a palindrome (9999999999).

The spelling of 31681418614 in words is "thirty-one billion, six hundred eighty-one million, four hundred eighteen thousand, six hundred fourteen".