18387707 has 6 divisors (see below), whose sum is σ = 19911132. Its totient is φ = 16973112.

The previous prime is 18387701. The next prime is 18387739. The reversal of 18387707 is 70778381.

It is not a de Polignac number, because 18387707 - 2⁸ = 18387451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18387701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54233 + ... + 54570.

It is an arithmetic number, because the mean of its divisors is an integer number (3318522).

Almost surely, 2^18387707 is an apocalyptic number.

18387707 is a deficient number, since it is larger than the sum of its proper divisors (1523425).

18387707 is a wasteful number, since it uses less digits than its factorization.

18387707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108829 (or 108816 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 18387707 is about 4288.0889682935. The cubic root of 18387707 is about 263.9424183798.

The spelling of 18387707 in words is "eighteen million, three hundred eighty-seven thousand, seven hundred seven".