31994849913 has 64 divisors (see below), whose sum is σ = 49218140160. Its totient is φ = 18332582400.

The previous prime is 31994849903. The next prime is 31994849947.

It is a happy number.

31994849913 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31994849913 - 2⁸ = 31994849657 is a prime.

It is a super-2 number, since 2×31994849913² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31994849903) 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 63 ways as a sum of consecutive naturals, for example, 25412278 + ... + 25413536.

It is an arithmetic number, because the mean of its divisors is an integer number (769033440).

Almost surely, 2^31994849913 is an apocalyptic number.

It is an amenable number.

31994849913 is a deficient number, since it is larger than the sum of its proper divisors (17223290247).

31994849913 is a wasteful number, since it uses less digits than its factorization.

31994849913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030.

The product of its digits is 7558272, while the sum is 60.

The spelling of 31994849913 in words is "thirty-one billion, nine hundred ninety-four million, eight hundred forty-nine thousand, nine hundred thirteen".