11220020018 has 8 divisors (see below), whose sum is σ = 17410375980. Its totient is φ = 5416561360.

The previous prime is 11220020017. The next prime is 11220020051. The reversal of 11220020018 is 81002002211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11213327449 + 6692569 = 105893^2 + 2587^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 11220019978 and 11220020005.

It is not an unprimeable number, because it can be changed into a prime (11220020017) 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, 96724253 + ... + 96724368.

Almost surely, 2^11220020018 is an apocalyptic number.

11220020018 is a deficient number, since it is larger than the sum of its proper divisors (6190355962).

11220020018 is a wasteful number, since it uses less digits than its factorization.

11220020018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193448652.

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

Adding to 11220020018 its reverse (81002002211), we get a palindrome (92222022229).

It can be divided in two parts, 112200200 and 18, that multiplied together give a square (2019603600 = 44940²).

The spelling of 11220020018 in words is "eleven billion, two hundred twenty million, twenty thousand, eighteen".