18105537388 has 6 divisors (see below), whose sum is σ = 31684690436. Its totient is φ = 9052768692.

The previous prime is 18105537341. The next prime is 18105537397. The reversal of 18105537388 is 88373550181.

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, 2263192170 + ... + 2263192177.

Almost surely, 2^18105537388 is an apocalyptic number.

It is an amenable number.

18105537388 is a deficient number, since it is larger than the sum of its proper divisors (13579153048).

18105537388 is a wasteful number, since it uses less digits than its factorization.

18105537388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4526384351 (or 4526384349 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 18105537388 in words is "eighteen billion, one hundred five million, five hundred thirty-seven thousand, three hundred eighty-eight".