18195919244 has 6 divisors (see below), whose sum is σ = 31842858684. Its totient is φ = 9097959620.

The previous prime is 18195919223. The next prime is 18195919253. The reversal of 18195919244 is 44291959181.

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 as a sum of consecutive naturals, namely, 2274489902 + ... + 2274489909.

It is an arithmetic number, because the mean of its divisors is an integer number (5307143114).

Almost surely, 2^18195919244 is an apocalyptic number.

It is an amenable number.

18195919244 is a deficient number, since it is larger than the sum of its proper divisors (13646939440).

18195919244 is a wasteful number, since it uses less digits than its factorization.

18195919244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4548979815 (or 4548979813 counting only the distinct ones).

The product of its digits is 933120, while the sum is 53.

The spelling of 18195919244 in words is "eighteen billion, one hundred ninety-five million, nine hundred nineteen thousand, two hundred forty-four".