18466633394 has 16 divisors (see below), whose sum is σ = 30224658816. Its totient is φ = 8392110000.

The previous prime is 18466633391. The next prime is 18466633439. The reversal of 18466633394 is 49333666481.

It is a happy number.

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, 16184 + ... + 192860.

It is an arithmetic number, because the mean of its divisors is an integer number (1889041176).

Almost surely, 2^18466633394 is an apocalyptic number.

18466633394 is a deficient number, since it is larger than the sum of its proper divisors (11758025422).

18466633394 is a wasteful number, since it uses less digits than its factorization.

18466633394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181441.

The product of its digits is 6718464, while the sum is 53.

The spelling of 18466633394 in words is "eighteen billion, four hundred sixty-six million, six hundred thirty-three thousand, three hundred ninety-four".