11020001220018 has 120 divisors (see below), whose sum is σ = 28734404856300. Its totient is φ = 3147482826432.

The previous prime is 11020001220017. The next prime is 11020001220037. The reversal of 11020001220018 is 81002210002011.

It can be written as a sum of positive squares in 2 ways, for example, as 10720208833929 + 299792386089 = 3274173^2 + 547533^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11020001220017) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 22853028 + ... + 23330256.

Almost surely, 2^{11020001220018} is an apocalyptic number.

11020001220018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11020001220018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14367202428150).

11020001220018 is an abundant number, since it is smaller than the sum of its proper divisors (17714403636282).

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

11020001220018 is a wasteful number, since it uses less digits than its factorization.

11020001220018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480166 (or 480150 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11020001220018 its reverse (81002210002011), we get a palindrome (92022211222029).

The spelling of 11020001220018 in words is "eleven trillion, twenty billion, one million, two hundred twenty thousand, eighteen".