18222474 has 8 divisors (see below), whose sum is σ = 36444960. Its totient is φ = 6074156.

The previous prime is 18222473. The next prime is 18222541. The reversal of 18222474 is 47422281.

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

18222474 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (18222473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1518534 + ... + 1518545.

It is an arithmetic number, because the mean of its divisors is an integer number (4555620).

Almost surely, 2^18222474 is an apocalyptic number.

18222474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18222474 is a wasteful number, since it uses less digits than its factorization.

18222474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037084.

The product of its digits is 7168, while the sum is 30.

The square root of 18222474 is about 4268.7789823321. The cubic root of 18222474 is about 263.1494377395.

The spelling of 18222474 in words is "eighteen million, two hundred twenty-two thousand, four hundred seventy-four".