22018001797 has 6 divisors (see below), whose sum is σ = 24201605414. Its totient is φ = 20016365160.

The previous prime is 22018001791. The next prime is 22018001801. The reversal of 22018001797 is 79710081022.

It can be written as a sum of positive squares in only one way, i.e., 12066143716 + 9951858081 = 109846^2 + 99759^2 .

It is not a de Polignac number, because 22018001797 - 2⁷ = 22018001669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22018001791) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 90983358 + ... + 90983599.

Almost surely, 2^22018001797 is an apocalyptic number.

It is an amenable number.

22018001797 is a deficient number, since it is larger than the sum of its proper divisors (2183603617).

22018001797 is a wasteful number, since it uses less digits than its factorization.

22018001797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181966979 (or 181966968 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 37.

The spelling of 22018001797 in words is "twenty-two billion, eighteen million, one thousand, seven hundred ninety-seven".