18919461922 has 8 divisors (see below), whose sum is σ = 28537736400. Its totient is φ = 9406883124.

The previous prime is 18919461889. The next prime is 18919461937. The reversal of 18919461922 is 22916491981.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18919461922.

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, 26423472 + ... + 26424187.

It is an arithmetic number, because the mean of its divisors is an integer number (3567217050).

Almost surely, 2^18919461922 is an apocalyptic number.

18919461922 is a deficient number, since it is larger than the sum of its proper divisors (9618274478).

18919461922 is a wasteful number, since it uses less digits than its factorization.

18919461922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52847840.

The product of its digits is 559872, while the sum is 52.

The spelling of 18919461922 in words is "eighteen billion, nine hundred nineteen million, four hundred sixty-one thousand, nine hundred twenty-two".