18205381316 has 24 divisors (see below), whose sum is σ = 33542177760. Its totient is φ = 8622072000.

The previous prime is 18205381307. The next prime is 18205381343. The reversal of 18205381316 is 61318350281.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 18205381316.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490616 + ... + 526416.

It is an arithmetic number, because the mean of its divisors is an integer number (1397590740).

Almost surely, 2^18205381316 is an apocalyptic number.

It is an amenable number.

18205381316 is a deficient number, since it is larger than the sum of its proper divisors (15336796444).

18205381316 is a wasteful number, since it uses less digits than its factorization.

18205381316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42515 (or 42513 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 18205381316 in words is "eighteen billion, two hundred five million, three hundred eighty-one thousand, three hundred sixteen".