18387986103 has 12 divisors (see below), whose sum is σ = 26634413520. Its totient is φ = 12224508576.

The previous prime is 18387986093. The next prime is 18387986119. The reversal of 18387986103 is 30168978381.

18387986103 is a `hidden beast` number, since 18 + 3 + 8 + 7 + 9 + 8 + 610 + 3 = 666.

It is not a de Polignac number, because 18387986103 - 2⁶ = 18387986039 is a prime.

It is a super-2 number, since 2×18387986103² (a number of 21 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 18387986103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18387986173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2842326 + ... + 2848787.

It is an arithmetic number, because the mean of its divisors is an integer number (2219534460).

Almost surely, 2^18387986103 is an apocalyptic number.

18387986103 is a deficient number, since it is larger than the sum of its proper divisors (8246427417).

18387986103 is a wasteful number, since it uses less digits than its factorization.

18387986103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691478 (or 5691475 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 18387986103 in words is "eighteen billion, three hundred eighty-seven million, nine hundred eighty-six thousand, one hundred three".