8417201820 has 48 divisors (see below), whose sum is σ = 23638157088. Its totient is φ = 2237921280.

The previous prime is 8417201803. The next prime is 8417201827. The reversal of 8417201820 is 281027148.

It is a happy number.

It is a super-2 number, since 2×8417201820² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8417201827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187921 + ... + 228360.

It is an arithmetic number, because the mean of its divisors is an integer number (492461606).

Almost surely, 2^8417201820 is an apocalyptic number.

It is an amenable number.

8417201820 is an abundant number, since it is smaller than the sum of its proper divisors (15220955268).

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

8417201820 is a wasteful number, since it uses less digits than its factorization.

8417201820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416630 (or 416628 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 8417201820 is about 91745.3095258826. The cubic root of 8417201820 is about 2034.1793760140.

Adding to 8417201820 its reverse (281027148), we get a palindrome (8698228968).

The spelling of 8417201820 in words is "eight billion, four hundred seventeen million, two hundred one thousand, eight hundred twenty".