18063329394 has 48 divisors (see below), whose sum is σ = 40360541760. Its totient is φ = 5383989600.

The previous prime is 18063329363. The next prime is 18063329429. The reversal of 18063329394 is 49392336081.

It is a happy number.

It is a super-2 number, since 2×18063329394² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159654 + ... + 248225.

It is an arithmetic number, because the mean of its divisors is an integer number (840844620).

Almost surely, 2^18063329394 is an apocalyptic number.

18063329394 is an abundant number, since it is smaller than the sum of its proper divisors (22297212366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18063329394 is a wasteful number, since it uses less digits than its factorization.

18063329394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407967 (or 407956 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 18063329394 in words is "eighteen billion, sixty-three million, three hundred twenty-nine thousand, three hundred ninety-four".