13018840938 has 32 divisors (see below), whose sum is σ = 29090617920. Its totient is φ = 4315634640.

The previous prime is 13018840937. The next prime is 13018840943. The reversal of 13018840938 is 83904881031.

13018840938 is a `hidden beast` number, since 1 + 30 + 188 + 409 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 13018840893 and 13018840902.

It is not an unprimeable number, because it can be changed into a prime (13018840937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656220 + ... + 675767.

It is an arithmetic number, because the mean of its divisors is an integer number (909081810).

Almost surely, 2^13018840938 is an apocalyptic number.

13018840938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13018840938 is an abundant number, since it is smaller than the sum of its proper divisors (16071776982).

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

13018840938 is a wasteful number, since it uses less digits than its factorization.

13018840938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332179 (or 1332173 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 13018840938 in words is "thirteen billion, eighteen million, eight hundred forty thousand, nine hundred thirty-eight".