19808934 has 36 divisors (see below), whose sum is σ = 41946156. Its totient is φ = 6235944.

The previous prime is 19808923. The next prime is 19808947. The reversal of 19808934 is 43980891.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 250707 + ... + 250785.

It is an arithmetic number, because the mean of its divisors is an integer number (1165171).

Almost surely, 2^19808934 is an apocalyptic number.

19808934 is an abundant number, since it is smaller than the sum of its proper divisors (22137222).

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

19808934 is an equidigital number, since it uses as much as digits as its factorization.

19808934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 19808934 is about 4450.7228626370. The cubic root of 19808934 is about 270.5746061763.

The spelling of 19808934 in words is "nineteen million, eight hundred eight thousand, nine hundred thirty-four".