18220006 has 16 divisors (see below), whose sum is σ = 31297824. Its totient is φ = 7792704.

The previous prime is 18219989. The next prime is 18220049. The reversal of 18220006 is 60002281.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8146 + ... + 10138.

It is an arithmetic number, because the mean of its divisors is an integer number (1956114).

Almost surely, 2^18220006 is an apocalyptic number.

18220006 is a deficient number, since it is larger than the sum of its proper divisors (13077818).

18220006 is a wasteful number, since it uses less digits than its factorization.

18220006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 18220006 is about 4268.4898969073. The cubic root of 18220006 is about 263.1375571329.

Adding to 18220006 its reverse (60002281), we get a palindrome (78222287).

The spelling of 18220006 in words is "eighteen million, two hundred twenty thousand, six".