20873917504512 has 132 divisors (see below), whose sum is σ = 60277513232976. Its totient is φ = 6957449625600.

The previous prime is 20873917504507. The next prime is 20873917504523. The reversal of 20873917504512 is 21540571937802.

20873917504512 is a `hidden beast` number, since 2 + 0 + 8 + 73 + 9 + 1 + 7 + 50 + 4 + 512 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 134024188 + ... + 134179844.

Almost surely, 2^{20873917504512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20873917504512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30138756616488).

20873917504512 is an abundant number, since it is smaller than the sum of its proper divisors (39403595728464).

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

20873917504512 is a wasteful number, since it uses less digits than its factorization.

20873917504512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170234 (or 170213 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 20873917504512 in words is "twenty trillion, eight hundred seventy-three billion, nine hundred seventeen million, five hundred four thousand, five hundred twelve".