20585474551 has 8 divisors (see below), whose sum is σ = 21685835520. Its totient is φ = 19486805112.

The previous prime is 20585474543. The next prime is 20585474557. The reversal of 20585474551 is 15547458502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20585474551 - 2³ = 20585474543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20585474557) 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, 397855 + ... + 446608.

It is an arithmetic number, because the mean of its divisors is an integer number (2710729440).

Almost surely, 2^20585474551 is an apocalyptic number.

20585474551 is a deficient number, since it is larger than the sum of its proper divisors (1100360969).

20585474551 is a wasteful number, since it uses less digits than its factorization.

20585474551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845765.

The product of its (nonzero) digits is 1120000, while the sum is 46.

The spelling of 20585474551 in words is "twenty billion, five hundred eighty-five million, four hundred seventy-four thousand, five hundred fifty-one".