18009743984 has 10 divisors (see below), whose sum is σ = 34893879000. Its totient is φ = 9004871984.

The previous prime is 18009743963. The next prime is 18009743987. The reversal of 18009743984 is 48934790081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009743987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562804484 + ... + 562804515.

It is an arithmetic number, because the mean of its divisors is an integer number (3489387900).

Almost surely, 2^18009743984 is an apocalyptic number.

It is an amenable number.

18009743984 is a deficient number, since it is larger than the sum of its proper divisors (16884135016).

18009743984 is a wasteful number, since it uses less digits than its factorization.

18009743984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125609007 (or 1125609001 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 18009743984 in words is "eighteen billion, nine million, seven hundred forty-three thousand, nine hundred eighty-four".