18222976 has 64 divisors (see below), whose sum is σ = 39168000. Its totient is φ = 8418816.

The previous prime is 18222961. The next prime is 18222979. The reversal of 18222976 is 67922281.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143425 + ... + 143551.

It is an arithmetic number, because the mean of its divisors is an integer number (612000).

Almost surely, 2^18222976 is an apocalyptic number.

18222976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18222976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19584000).

18222976 is an abundant number, since it is smaller than the sum of its proper divisors (20945024).

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

18222976 is a wasteful number, since it uses less digits than its factorization.

18222976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 207 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 18222976 is about 4268.8377809423. The cubic root of 18222976 is about 263.1518541659.

The spelling of 18222976 in words is "eighteen million, two hundred twenty-two thousand, nine hundred seventy-six".