20338426171872 has 36 divisors (see below), whose sum is σ = 57837399427080. Its totient is φ = 6779475390528.

The previous prime is 20338426171769. The next prime is 20338426171883. The reversal of 20338426171872 is 27817162483302.

It is a happy number.

20338426171872 is a `hidden beast` number, since 2 + 0 + 3 + 3 + 8 + 4 + 2 + 617 + 18 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35309767372 + ... + 35309767947.

It is an arithmetic number, because the mean of its divisors is an integer number (1606594428530).

Almost surely, 2^{20338426171872} is an apocalyptic number.

It is an amenable number.

20338426171872 is an abundant number, since it is smaller than the sum of its proper divisors (37498973255208).

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

20338426171872 is a wasteful number, since it uses less digits than its factorization.

20338426171872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70619535335 (or 70619535324 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 20338426171872 in words is "twenty trillion, three hundred thirty-eight billion, four hundred twenty-six million, one hundred seventy-one thousand, eight hundred seventy-two".