19218495938 has 32 divisors (see below), whose sum is σ = 29970864000. Its totient is φ = 9236505600.

The previous prime is 19218495913. The next prime is 19218495997. The reversal of 19218495938 is 83959481291.

It is a super-2 number, since 2×19218495938² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1443938 + ... + 1457186.

It is an arithmetic number, because the mean of its divisors is an integer number (936589500).

Almost surely, 2^19218495938 is an apocalyptic number.

19218495938 is a deficient number, since it is larger than the sum of its proper divisors (10752368062).

19218495938 is a wasteful number, since it uses less digits than its factorization.

19218495938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13562.

The product of its digits is 5598720, while the sum is 59.

The spelling of 19218495938 in words is "nineteen billion, two hundred eighteen million, four hundred ninety-five thousand, nine hundred thirty-eight".