19836420 has 24 divisors (see below), whose sum is σ = 55542144. Its totient is φ = 5289696.

The previous prime is 19836391. The next prime is 19836431. The reversal of 19836420 is 2463891.

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 7 ways as a sum of consecutive naturals, for example, 165244 + ... + 165363.

It is an arithmetic number, because the mean of its divisors is an integer number (2314256).

Almost surely, 2^19836420 is an apocalyptic number.

19836420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19836420 is an abundant number, since it is smaller than the sum of its proper divisors (35705724).

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

19836420 is a wasteful number, since it uses less digits than its factorization.

19836420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330619 (or 330617 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 19836420 is about 4453.8096052705. The cubic root of 19836420 is about 270.6996941209.

The spelling of 19836420 in words is "nineteen million, eight hundred thirty-six thousand, four hundred twenty".