18010532221 has 8 divisors (see below), whose sum is σ = 19660874688. Its totient is φ = 16362360000.

The previous prime is 18010532209. The next prime is 18010532251. The reversal of 18010532221 is 12223501081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18010532221 - 2¹⁵ = 18010499453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18010532251) 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, 525180 + ... + 558421.

It is an arithmetic number, because the mean of its divisors is an integer number (2457609336).

Almost surely, 2^18010532221 is an apocalyptic number.

18010532221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18010532221 is a deficient number, since it is larger than the sum of its proper divisors (1650342467).

18010532221 is a wasteful number, since it uses less digits than its factorization.

18010532221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085123.

The product of its (nonzero) digits is 960, while the sum is 25.

The spelling of 18010532221 in words is "eighteen billion, ten million, five hundred thirty-two thousand, two hundred twenty-one".