19820046 has 8 divisors (see below), whose sum is σ = 39640104. Its totient is φ = 6606680.

The previous prime is 19820027. The next prime is 19820057. The reversal of 19820046 is 64002891.

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

19820046 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 19819995 and 19820022.

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, 1651665 + ... + 1651676.

It is an arithmetic number, because the mean of its divisors is an integer number (4955013).

Almost surely, 2^19820046 is an apocalyptic number.

19820046 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.

19820046 is a wasteful number, since it uses less digits than its factorization.

19820046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303346.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 19820046 is about 4451.9710241645. The cubic root of 19820046 is about 270.6251904733.

The spelling of 19820046 in words is "nineteen million, eight hundred twenty thousand, forty-six".