18885218236 has 6 divisors (see below), whose sum is σ = 33049131920. Its totient is φ = 9442609116.

The previous prime is 18885218221. The next prime is 18885218249. The reversal of 18885218236 is 63281258881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360652276 + ... + 2360652283.

Almost surely, 2^18885218236 is an apocalyptic number.

It is an amenable number.

18885218236 is a deficient number, since it is larger than the sum of its proper divisors (14163913684).

18885218236 is a wasteful number, since it uses less digits than its factorization.

18885218236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721304563 (or 4721304561 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 52.

The spelling of 18885218236 in words is "eighteen billion, eight hundred eighty-five million, two hundred eighteen thousand, two hundred thirty-six".