18905046 has 8 divisors (see below), whose sum is σ = 37810104. Its totient is φ = 6301680.

The previous prime is 18905027. The next prime is 18905053. The reversal of 18905046 is 64050981.

It is a sphenic number, since it is the product of 3 distinct primes.

18905046 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18904998 and 18905016.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1575415 + ... + 1575426.

It is an arithmetic number, because the mean of its divisors is an integer number (4726263).

Almost surely, 2^18905046 is an apocalyptic number.

18905046 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18905046 is a wasteful number, since it uses less digits than its factorization.

18905046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150846.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18905046 is about 4347.9933302617. The cubic root of 18905046 is about 266.3949040409.

The spelling of 18905046 in words is "eighteen million, nine hundred five thousand, forty-six".