20024017556172 has 48 divisors (see below), whose sum is σ = 55719005379072. Its totient is φ = 5472402312960.

The previous prime is 20024017556167. The next prime is 20024017556209. The reversal of 20024017556172 is 27165571042002.

It is a super-2 number, since 2×20024017556172² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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, 5182197229 + ... + 5182201092.

It is an arithmetic number, because the mean of its divisors is an integer number (1160812612064).

Almost surely, 2^{20024017556172} is an apocalyptic number.

It is an amenable number.

20024017556172 is an abundant number, since it is smaller than the sum of its proper divisors (35694987822900).

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

20024017556172 is a wasteful number, since it uses less digits than its factorization.

20024017556172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364398358 (or 10364398356 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

Adding to 20024017556172 its reverse (27165571042002), we get a palindrome (47189588598174).

The spelling of 20024017556172 in words is "twenty trillion, twenty-four billion, seventeen million, five hundred fifty-six thousand, one hundred seventy-two".