18061222 has 8 divisors (see below), whose sum is σ = 27463176. Its totient is φ = 8906832.

The previous prime is 18061201. The next prime is 18061223. The reversal of 18061222 is 22216081.

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

It is a junction number, because it is equal to n+sod(n) for n = 18061193 and 18061202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18061223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61708 + ... + 61999.

It is an arithmetic number, because the mean of its divisors is an integer number (3432897).

Almost surely, 2^18061222 is an apocalyptic number.

18061222 is a deficient number, since it is larger than the sum of its proper divisors (9401954).

18061222 is a wasteful number, since it uses less digits than its factorization.

18061222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123782.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18061222 is about 4249.8496443992. The cubic root of 18061222 is about 262.3709273232.

The spelling of 18061222 in words is "eighteen million, sixty-one thousand, two hundred twenty-two".