18345897928 has 16 divisors (see below), whose sum is σ = 35894148480. Its totient is φ = 8774125008.

The previous prime is 18345897907. The next prime is 18345897943. The reversal of 18345897928 is 82979854381.

It is a self number, because there is not a number n which added to its sum of digits gives 18345897928.

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, 49852800 + ... + 49853167.

It is an arithmetic number, because the mean of its divisors is an integer number (2243384280).

Almost surely, 2^18345897928 is an apocalyptic number.

It is an amenable number.

18345897928 is a deficient number, since it is larger than the sum of its proper divisors (17548250552).

18345897928 is a wasteful number, since it uses less digits than its factorization.

18345897928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99705996 (or 99705992 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 64.

The spelling of 18345897928 in words is "eighteen billion, three hundred forty-five million, eight hundred ninety-seven thousand, nine hundred twenty-eight".