31464917818 has 4 divisors (see below), whose sum is σ = 47197376730. Its totient is φ = 15732458908.

The previous prime is 31464917791. The next prime is 31464917831. The reversal of 31464917818 is 81871946413.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18315020889 + 13149896929 = 135333^2 + 114673^2 .

It is a super-2 number, since 2×31464917818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7866229453 + ... + 7866229456.

Almost surely, 2^31464917818 is an apocalyptic number.

31464917818 is a deficient number, since it is larger than the sum of its proper divisors (15732458912).

31464917818 is a wasteful number, since it uses less digits than its factorization.

31464917818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15732458911.

The product of its digits is 1161216, while the sum is 52.

The spelling of 31464917818 in words is "thirty-one billion, four hundred sixty-four million, nine hundred seventeen thousand, eight hundred eighteen".