18392343856 has 20 divisors (see below), whose sum is σ = 35740919032. Its totient is φ = 9168880896.

The previous prime is 18392343847. The next prime is 18392343857. The reversal of 18392343856 is 65834329381.

It is not an unprimeable number, because it can be changed into a prime (18392343857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1700130 + ... + 1710913.

Almost surely, 2^18392343856 is an apocalyptic number.

18392343856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18392343856 is a deficient number, since it is larger than the sum of its proper divisors (17348575176).

18392343856 is a wasteful number, since it uses less digits than its factorization.

18392343856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411388 (or 3411382 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 52.

The spelling of 18392343856 in words is "eighteen billion, three hundred ninety-two million, three hundred forty-three thousand, eight hundred fifty-six".