18818705 has 16 divisors (see below), whose sum is σ = 23445504. Its totient is φ = 14485440.

The previous prime is 18818693. The next prime is 18818707. The reversal of 18818705 is 50781881.

It is not a de Polignac number, because 18818705 - 2⁶ = 18818641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18818707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48944 + ... + 49326.

It is an arithmetic number, because the mean of its divisors is an integer number (1465344).

Almost surely, 2^18818705 is an apocalyptic number.

It is an amenable number.

18818705 is a deficient number, since it is larger than the sum of its proper divisors (4626799).

18818705 is a wasteful number, since it uses less digits than its factorization.

18818705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its (nonzero) digits is 17920, while the sum is 38.

The square root of 18818705 is about 4338.0531347599. The cubic root of 18818705 is about 265.9887354606.

The spelling of 18818705 in words is "eighteen million, eight hundred eighteen thousand, seven hundred five".