18466633393 has 8 divisors (see below), whose sum is σ = 19910307200. Its totient is φ = 17026268688.

The previous prime is 18466633391. The next prime is 18466633439. The reversal of 18466633393 is 39333666481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18466633393 - 2¹ = 18466633391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18466633393.

It is not an unprimeable number, because it can be changed into a prime (18466633391) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 815673 + ... + 838006.

It is an arithmetic number, because the mean of its divisors is an integer number (2488788400).

Almost surely, 2^18466633393 is an apocalyptic number.

18466633393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18466633393 is a deficient number, since it is larger than the sum of its proper divisors (1443673807).

18466633393 is a wasteful number, since it uses less digits than its factorization.

18466633393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654551.

The product of its digits is 5038848, while the sum is 52.

The spelling of 18466633393 in words is "eighteen billion, four hundred sixty-six million, six hundred thirty-three thousand, three hundred ninety-three".