13817817838 has 16 divisors (see below), whose sum is σ = 23941032624. Its totient is φ = 5911365760.

The previous prime is 13817817809. The next prime is 13817817857. The reversal of 13817817838 is 83871871831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18472645 + ... + 18473392.

It is an arithmetic number, because the mean of its divisors is an integer number (1496314539).

Almost surely, 2^13817817838 is an apocalyptic number.

13817817838 is a deficient number, since it is larger than the sum of its proper divisors (10123214786).

13817817838 is a wasteful number, since it uses less digits than its factorization.

13817817838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36946067.

The product of its digits is 1806336, while the sum is 55.

The spelling of 13817817838 in words is "thirteen billion, eight hundred seventeen million, eight hundred seventeen thousand, eight hundred thirty-eight".