20117573451136 has 64 divisors (see below), whose sum is σ = 45807278107680. Its totient is φ = 8621087920128.

The previous prime is 20117573451109. The next prime is 20117573451139. The reversal of 20117573451136 is 63115437571102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117573451139) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9716086 + ... + 11603338.

Almost surely, 2^{20117573451136} is an apocalyptic number.

It is an amenable number.

20117573451136 is an abundant number, since it is smaller than the sum of its proper divisors (25689704656544).

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

20117573451136 is a wasteful number, since it uses less digits than its factorization.

20117573451136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899171 (or 1899159 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 20117573451136 in words is "twenty trillion, one hundred seventeen billion, five hundred seventy-three million, four hundred fifty-one thousand, one hundred thirty-six".