18865107 has 6 divisors (see below), whose sum is σ = 27249612. Its totient is φ = 12576732.

The previous prime is 18865103. The next prime is 18865139. The reversal of 18865107 is 70156881.

It is not a de Polignac number, because 18865107 - 2² = 18865103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18865103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1048053 + ... + 1048070.

It is an arithmetic number, because the mean of its divisors is an integer number (4541602).

Almost surely, 2^18865107 is an apocalyptic number.

18865107 is a deficient number, since it is larger than the sum of its proper divisors (8384505).

18865107 is a wasteful number, since it uses less digits than its factorization.

18865107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096129 (or 2096126 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 18865107 is about 4343.3980936589. The cubic root of 18865107 is about 266.2071755497.

The spelling of 18865107 in words is "eighteen million, eight hundred sixty-five thousand, one hundred seven".