18315497928 has 192 divisors, whose sum is σ = 57513456000. Its totient is φ = 4817691648.

The previous prime is 18315497833. The next prime is 18315497939. The reversal of 18315497928 is 82979451381.

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 47 ways as a sum of consecutive naturals, for example, 6710068 + ... + 6712796.

It is an arithmetic number, because the mean of its divisors is an integer number (299549250).

Almost surely, 2^18315497928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18315497928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28756728000).

18315497928 is an abundant number, since it is smaller than the sum of its proper divisors (39197958072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18315497928 is a wasteful number, since it uses less digits than its factorization.

18315497928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204 (or 3193 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 57.

The spelling of 18315497928 in words is "eighteen billion, three hundred fifteen million, four hundred ninety-seven thousand, nine hundred twenty-eight".