18819922 has 16 divisors (see below), whose sum is σ = 30862944. Its totient is φ = 8536000.

The previous prime is 18819917. The next prime is 18819947. The reversal of 18819922 is 22991881.

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 7 ways as a sum of consecutive naturals, for example, 18897 + ... + 19867.

It is an arithmetic number, because the mean of its divisors is an integer number (1928934).

Almost surely, 2^18819922 is an apocalyptic number.

18819922 is a deficient number, since it is larger than the sum of its proper divisors (12043022).

18819922 is a wasteful number, since it uses less digits than its factorization.

18819922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865.

The product of its digits is 20736, while the sum is 40.

The square root of 18819922 is about 4338.1934027888. The cubic root of 18819922 is about 265.9944691408.

The spelling of 18819922 in words is "eighteen million, eight hundred nineteen thousand, nine hundred twenty-two".