13985858931 has 24 divisors (see below), whose sum is σ = 20756682240. Its totient is φ = 8368966320.

The previous prime is 13985858927. The next prime is 13985858933.

13985858931 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13985858931 - 2² = 13985858927 is a prime.

It is a super-2 number, since 2×13985858931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13985858933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215175 + ... + 272528.

It is an arithmetic number, because the mean of its divisors is an integer number (864861760).

Almost surely, 2^13985858931 is an apocalyptic number.

13985858931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13985858931 is a deficient number, since it is larger than the sum of its proper divisors (6770823309).

13985858931 is a wasteful number, since it uses less digits than its factorization.

13985858931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487807 (or 487796 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 60.

The spelling of 13985858931 in words is "thirteen billion, nine hundred eighty-five million, eight hundred fifty-eight thousand, nine hundred thirty-one".