13933938618 has 72 divisors (see below), whose sum is σ = 31464533568. Its totient is φ = 4456184544.

The previous prime is 13933938617. The next prime is 13933938619. The reversal of 13933938618 is 81683933931.

13933938618 is a `hidden beast` number, since 13 + 9 + 3 + 3 + 9 + 3 + 8 + 618 = 666.

13933938618 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13933938617) and next prime (13933938619).

It is not an unprimeable number, because it can be changed into a prime (13933938617) 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 35 ways as a sum of consecutive naturals, for example, 2464671 + ... + 2470317.

Almost surely, 2^13933938618 is an apocalyptic number.

13933938618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13933938618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15732266784).

13933938618 is an abundant number, since it is smaller than the sum of its proper divisors (17530594950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13933938618 is a wasteful number, since it uses less digits than its factorization.

13933938618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5876 (or 5844 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The spelling of 13933938618 in words is "thirteen billion, nine hundred thirty-three million, nine hundred thirty-eight thousand, six hundred eighteen".