421818946 has 8 divisors (see below), whose sum is σ = 634029120. Its totient is φ = 210475908.

The previous prime is 421818923. The next prime is 421818959. The reversal of 421818946 is 649818124.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 215566 + ... + 217513.

It is an arithmetic number, because the mean of its divisors is an integer number (79253640).

Almost surely, 2^421818946 is an apocalyptic number.

421818946 is a deficient number, since it is larger than the sum of its proper divisors (212210174).

421818946 is a wasteful number, since it uses less digits than its factorization.

421818946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433568.

The product of its digits is 110592, while the sum is 43.

The square root of 421818946 is about 20538.2313259930. The cubic root of 421818946 is about 749.9667813435.

The spelling of 421818946 in words is "four hundred twenty-one million, eight hundred eighteen thousand, nine hundred forty-six".