18946308 has 12 divisors (see below), whose sum is σ = 44208080. Its totient is φ = 6315432.

The previous prime is 18946307. The next prime is 18946337. The reversal of 18946308 is 80364981.

18946308 is nontrivially palindromic in base 7.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18946307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789418 + ... + 789441.

Almost surely, 2^18946308 is an apocalyptic number.

It is an amenable number.

18946308 is an abundant number, since it is smaller than the sum of its proper divisors (25261772).

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

18946308 is a wasteful number, since it uses less digits than its factorization.

18946308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578866 (or 1578864 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18946308 is about 4352.7356914933. The cubic root of 18946308 is about 266.5885736606.

The spelling of 18946308 in words is "eighteen million, nine hundred forty-six thousand, three hundred eight".