18820454116 has 12 divisors (see below), whose sum is σ = 33011861932. Its totient is φ = 9388493568.

The previous prime is 18820454111. The next prime is 18820454179. The reversal of 18820454116 is 61145402881.

It can be written as a sum of positive squares in 2 ways, for example, as 3282831616 + 15537622500 = 57296^2 + 124650^2 .

It is a super-2 number, since 2×18820454116² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18820454111) 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, 5431425 + ... + 5434888.

Almost surely, 2^18820454116 is an apocalyptic number.

It is an amenable number.

18820454116 is a deficient number, since it is larger than the sum of its proper divisors (14191407816).

18820454116 is a wasteful number, since it uses less digits than its factorization.

18820454116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10866750 (or 10866748 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

Adding to 18820454116 its reverse (61145402881), we get a palindrome (79965856997).

The spelling of 18820454116 in words is "eighteen billion, eight hundred twenty million, four hundred fifty-four thousand, one hundred sixteen".