18063355436 has 12 divisors (see below), whose sum is σ = 36126710928. Its totient is φ = 7741438032.

The previous prime is 18063355433. The next prime is 18063355493. The reversal of 18063355436 is 63455336081.

It is a happy number.

18063355436 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (18063355433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322559891 + ... + 322559946.

It is an arithmetic number, because the mean of its divisors is an integer number (3010559244).

Almost surely, 2^18063355436 is an apocalyptic number.

It is an amenable number.

18063355436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18063355436 is a wasteful number, since it uses less digits than its factorization.

18063355436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645119848 (or 645119846 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 18063355436 in words is "eighteen billion, sixty-three million, three hundred fifty-five thousand, four hundred thirty-six".