18223201108021 has 24 divisors (see below), whose sum is σ = 22829472467424. Its totient is φ = 14418099652320.

The previous prime is 18223201107977. The next prime is 18223201108093. The reversal of 18223201108021 is 12080110232281.

It is not a de Polignac number, because 18223201108021 - 2⁷ = 18223201107893 is a prime.

It is a super-2 number, since 2×18223201108021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18223201100021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40602786 + ... + 41049148.

It is an arithmetic number, because the mean of its divisors is an integer number (951228019476).

Almost surely, 2^{18223201108021} is an apocalyptic number.

It is an amenable number.

18223201108021 is a deficient number, since it is larger than the sum of its proper divisors (4606271359403).

18223201108021 is a wasteful number, since it uses less digits than its factorization.

18223201108021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510481 (or 510474 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The spelling of 18223201108021 in words is "eighteen trillion, two hundred twenty-three billion, two hundred one million, one hundred eight thousand, twenty-one".