19808922 has 16 divisors (see below), whose sum is σ = 45277632. Its totient is φ = 5659680.

The previous prime is 19808917. The next prime is 19808923. The reversal of 19808922 is 22980891.

It is not an unprimeable number, because it can be changed into a prime (19808923) by changing a digit.

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, 235779 + ... + 235862.

It is an arithmetic number, because the mean of its divisors is an integer number (2829852).

Almost surely, 2^19808922 is an apocalyptic number.

19808922 is an abundant number, since it is smaller than the sum of its proper divisors (25468710).

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

19808922 is a wasteful number, since it uses less digits than its factorization.

19808922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471653.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 19808922 is about 4450.7215145412. The cubic root of 19808922 is about 270.5745515394.

The spelling of 19808922 in words is "nineteen million, eight hundred eight thousand, nine hundred twenty-two".