18222510 has 16 divisors (see below), whose sum is σ = 43734096. Its totient is φ = 4859328.

The previous prime is 18222473. The next prime is 18222541. The reversal of 18222510 is 1522281.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303679 + ... + 303738.

It is an arithmetic number, because the mean of its divisors is an integer number (2733381).

Almost surely, 2^18222510 is an apocalyptic number.

18222510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18222510 is an abundant number, since it is smaller than the sum of its proper divisors (25511586).

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

18222510 is a wasteful number, since it uses less digits than its factorization.

18222510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607427.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 18222510 is about 4268.7831989924. The cubic root of 18222510 is about 263.1496110305.

Adding to 18222510 its reverse (1522281), we get a palindrome (19744791).

The spelling of 18222510 in words is "eighteen million, two hundred twenty-two thousand, five hundred ten".