18243708416 has 20 divisors (see below), whose sum is σ = 36451785612. Its totient is φ = 9121853952.

The previous prime is 18243708391. The next prime is 18243708433. The reversal of 18243708416 is 61480734281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17815610 + ... + 17816633.

Almost surely, 2^18243708416 is an apocalyptic number.

18243708416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18243708416 is a deficient number, since it is larger than the sum of its proper divisors (18208077196).

18243708416 is an frugal number, since it uses more digits than its factorization.

18243708416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35632261 (or 35632245 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 18243708416 in words is "eighteen billion, two hundred forty-three million, seven hundred eight thousand, four hundred sixteen".