18906318 has 32 divisors (see below), whose sum is σ = 43466400. Its totient is φ = 6084288.

The previous prime is 18906301. The next prime is 18906353. The reversal of 18906318 is 81360981.

18906318 is a `hidden beast` number, since 18 + 9 + 0 + 631 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4471 + ... + 7602.

It is an arithmetic number, because the mean of its divisors is an integer number (1358325).

Almost surely, 2^18906318 is an apocalyptic number.

18906318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18906318 is an abundant number, since it is smaller than the sum of its proper divisors (24560082).

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

18906318 is a wasteful number, since it uses less digits than its factorization.

18906318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12113 (or 12107 counting only the distinct ones).

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

The square root of 18906318 is about 4348.1396021747. The cubic root of 18906318 is about 266.4008785784.

The spelling of 18906318 in words is "eighteen million, nine hundred six thousand, three hundred eighteen".