18738405347103 has 48 divisors (see below), whose sum is σ = 30449063124480. Its totient is φ = 11017960759872.

The previous prime is 18738405347069. The next prime is 18738405347117. The reversal of 18738405347103 is 30174350483781.

18738405347103 is a `hidden beast` number, since 1 + 8 + 7 + 38 + 4 + 0 + 534 + 71 + 0 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-18738405347103 is a prime.

It is a super-2 number, since 2×18738405347103² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18738405347103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18738405347143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1315525 + ... + 6261582.

It is an arithmetic number, because the mean of its divisors is an integer number (634355481760).

Almost surely, 2^{18738405347103} is an apocalyptic number.

18738405347103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18738405347103 is a deficient number, since it is larger than the sum of its proper divisors (11710657777377).

18738405347103 is a wasteful number, since it uses less digits than its factorization.

18738405347103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7578068 (or 7578065 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 18738405347103 in words is "eighteen trillion, seven hundred thirty-eight billion, four hundred five million, three hundred forty-seven thousand, one hundred three".