18063918 has 32 divisors (see below), whose sum is σ = 41231520. Its totient is φ = 5857920.

The previous prime is 18063907. The next prime is 18063919. The reversal of 18063918 is 81936081.

18063918 is a `hidden beast` number, since 1 + 8 + 0 + 639 + 18 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18063919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2523 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (1288485).

Almost surely, 2^18063918 is an apocalyptic number.

18063918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18063918 is an abundant number, since it is smaller than the sum of its proper divisors (23167602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18063918 is a wasteful number, since it uses less digits than its factorization.

18063918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9089 (or 9083 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18063918 is about 4250.1668202554. The cubic root of 18063918 is about 262.3839813832.

Adding to 18063918 its reverse (81936081), we get a palindrome (99999999).

It can be divided in two parts, 18063 and 918, that added together give a palindrome (18981).

The spelling of 18063918 in words is "eighteen million, sixty-three thousand, nine hundred eighteen".