18215376416 has 24 divisors (see below), whose sum is σ = 35932849344. Its totient is φ = 9089573440.

The previous prime is 18215376409. The next prime is 18215376463. The reversal of 18215376416 is 61467351281.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549740 + ... + 581931.

It is an arithmetic number, because the mean of its divisors is an integer number (1497202056).

Almost surely, 2^18215376416 is an apocalyptic number.

18215376416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18215376416 is a deficient number, since it is larger than the sum of its proper divisors (17717472928).

18215376416 is a wasteful number, since it uses less digits than its factorization.

18215376416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132184 (or 1132176 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The spelling of 18215376416 in words is "eighteen billion, two hundred fifteen million, three hundred seventy-six thousand, four hundred sixteen".