18022210001 has 4 divisors (see below), whose sum is σ = 18121780404. Its totient is φ = 17922639600.

The previous prime is 18022209979. The next prime is 18022210021. The reversal of 18022210001 is 10001222081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1488107776 + 16534102225 = 38576^2 + 128585^2 .

It is a cyclic number.

It is not a de Polignac number, because 18022210001 - 2⁶ = 18022209937 is a prime.

It is a super-5 number, since 5×18022210001⁵ (a number of 52 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18022210021) 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, 49784930 + ... + 49785291.

It is an arithmetic number, because the mean of its divisors is an integer number (4530445101).

Almost surely, 2^18022210001 is an apocalyptic number.

It is an amenable number.

18022210001 is a deficient number, since it is larger than the sum of its proper divisors (99570403).

18022210001 is an equidigital number, since it uses as much as digits as its factorization.

18022210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99570402.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 18022210001 its reverse (10001222081), we get a palindrome (28023432082).

The spelling of 18022210001 in words is "eighteen billion, twenty-two million, two hundred ten thousand, one".