20513289554005 has 8 divisors (see below), whose sum is σ = 24615974246400. Its totient is φ = 16410613788816.

The previous prime is 20513289553979. The next prime is 20513289554033. The reversal of 20513289554005 is 50045598231502.

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 20513289554005 - 2⁵ = 20513289553973 is a prime.

It is a super-3 number, since 3×20513289554005³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20513289554005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4888716 + ... + 8057674.

It is an arithmetic number, because the mean of its divisors is an integer number (3076996780800).

Almost surely, 2^{20513289554005} is an apocalyptic number.

It is an amenable number.

20513289554005 is a deficient number, since it is larger than the sum of its proper divisors (4102684692395).

20513289554005 is a wasteful number, since it uses less digits than its factorization.

20513289554005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4463603.

The product of its (nonzero) digits is 2160000, while the sum is 49.

The spelling of 20513289554005 in words is "twenty trillion, five hundred thirteen billion, two hundred eighty-nine million, five hundred fifty-four thousand, five".