20520050254551 has 6 divisors (see below), whose sum is σ = 29640072589920. Its totient is φ = 13680033503028.

The previous prime is 20520050254531. The next prime is 20520050254553. The reversal of 20520050254551 is 15545205002502.

20520050254551 is a `hidden beast` number, since 2 + 0 + 5 + 2 + 0 + 0 + 50 + 2 + 54 + 551 = 666.

It is not a de Polignac number, because 20520050254551 - 2²⁶ = 20519983145687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520050254553) 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 5 ways as a sum of consecutive naturals, for example, 1140002791911 + ... + 1140002791928.

It is an arithmetic number, because the mean of its divisors is an integer number (4940012098320).

Almost surely, 2^{20520050254551} is an apocalyptic number.

20520050254551 is a deficient number, since it is larger than the sum of its proper divisors (9120022335369).

20520050254551 is a wasteful number, since it uses less digits than its factorization.

20520050254551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280005583845 (or 2280005583842 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 20520050254551 in words is "twenty trillion, five hundred twenty billion, fifty million, two hundred fifty-four thousand, five hundred fifty-one".