20617403220 has 72 divisors (see below), whose sum is σ = 62702954496. Its totient is φ = 5483600832.

The previous prime is 20617403201. The next prime is 20617403221. The reversal of 20617403220 is 2230471602.

20617403220 is a `hidden beast` number, since 2 + 0 + 617 + 40 + 3 + 2 + 2 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20617403221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80592 + ... + 218471.

It is an arithmetic number, because the mean of its divisors is an integer number (870874368).

Almost surely, 2^20617403220 is an apocalyptic number.

20617403220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20617403220 is an abundant number, since it is smaller than the sum of its proper divisors (42085551276).

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

20617403220 is a wasteful number, since it uses less digits than its factorization.

20617403220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299461 (or 299456 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

Adding to 20617403220 its reverse (2230471602), we get a palindrome (22847874822).

The spelling of 20617403220 in words is "twenty billion, six hundred seventeen million, four hundred three thousand, two hundred twenty".