18243654368 has 24 divisors (see below), whose sum is σ = 36175600440. Its totient is φ = 9056200320.

The previous prime is 18243654337. The next prime is 18243654389. The reversal of 18243654368 is 86345634281.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046323 + ... + 2055218.

It is an arithmetic number, because the mean of its divisors is an integer number (1507316685).

Almost surely, 2^18243654368 is an apocalyptic number.

It is an amenable number.

18243654368 is a deficient number, since it is larger than the sum of its proper divisors (17931946072).

18243654368 is a wasteful number, since it uses less digits than its factorization.

18243654368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101690 (or 4101682 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 50.

The spelling of 18243654368 in words is "eighteen billion, two hundred forty-three million, six hundred fifty-four thousand, three hundred sixty-eight".