18223455321 has 12 divisors (see below), whose sum is σ = 26353638948. Its totient is φ = 12134722464.

The previous prime is 18223455301. The next prime is 18223455343. The reversal of 18223455321 is 12355432281.

18223455321 is a `hidden beast` number, since 1 + 82 + 2 + 3 + 4 + 553 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1727649225 + 16495806096 = 41565^2 + 128436^2 .

It is not a de Polignac number, because 18223455321 - 2²² = 18219261017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18223455301) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 1179210 + ... + 1194563.

It is an arithmetic number, because the mean of its divisors is an integer number (2196136579).

Almost surely, 2^18223455321 is an apocalyptic number.

It is an amenable number.

18223455321 is a deficient number, since it is larger than the sum of its proper divisors (8130183627).

18223455321 is a wasteful number, since it uses less digits than its factorization.

18223455321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374632 (or 2374629 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The spelling of 18223455321 in words is "eighteen billion, two hundred twenty-three million, four hundred fifty-five thousand, three hundred twenty-one".