18221016640064 has 84 divisors (see below), whose sum is σ = 41912874580992. Its totient is φ = 7699020161280.

The previous prime is 18221016640037. The next prime is 18221016640069. The reversal of 18221016640064 is 46004661012281.

It is not an unprimeable number, because it can be changed into a prime (18221016640069) 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 11 ways as a sum of consecutive naturals, for example, 1775744 + ... + 6292479.

Almost surely, 2^{18221016640064} is an apocalyptic number.

18221016640064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18221016640064 is an abundant number, since it is smaller than the sum of its proper divisors (23691857940928).

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

18221016640064 is an frugal number, since it uses more digits than its factorization.

18221016640064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8068384 (or 8068303 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 18221016640064 in words is "eighteen trillion, two hundred twenty-one billion, sixteen million, six hundred forty thousand, sixty-four".