18222503 has 8 divisors (see below), whose sum is σ = 19668096. Its totient is φ = 16783200.

The previous prime is 18222473. The next prime is 18222541. The reversal of 18222503 is 30522281.

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

It is a cyclic number.

It is not a de Polignac number, because 18222503 - 2¹⁰ = 18221479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222553) 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, 5738 + ... + 8328.

It is an arithmetic number, because the mean of its divisors is an integer number (2458512).

Almost surely, 2^18222503 is an apocalyptic number.

18222503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18222503 is a deficient number, since it is larger than the sum of its proper divisors (1445593).

18222503 is a wasteful number, since it uses less digits than its factorization.

18222503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18222503 is about 4268.7823790866. The cubic root of 18222503 is about 263.1495773350.

Adding to 18222503 its reverse (30522281), we get a palindrome (48744784).

The spelling of 18222503 in words is "eighteen million, two hundred twenty-two thousand, five hundred three".