20117510562405 has 32 divisors (see below), whose sum is σ = 32838157077120. Its totient is φ = 10513787581440.

The previous prime is 20117510562397. The next prime is 20117510562431. The reversal of 20117510562405 is 50426501571102.

It is not a de Polignac number, because 20117510562405 - 2³ = 20117510562397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36035536 + ... + 36589545.

It is an arithmetic number, because the mean of its divisors is an integer number (1026192408660).

Almost surely, 2^{20117510562405} is an apocalyptic number.

It is an amenable number.

20117510562405 is a deficient number, since it is larger than the sum of its proper divisors (12720646514715).

20117510562405 is a wasteful number, since it uses less digits than its factorization.

20117510562405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72625461.

The product of its (nonzero) digits is 84000, while the sum is 39.

The spelling of 20117510562405 in words is "twenty trillion, one hundred seventeen billion, five hundred ten million, five hundred sixty-two thousand, four hundred five".