20117105576645 has 16 divisors (see below), whose sum is σ = 30097280032128. Its totient is φ = 12540533346240.

The previous prime is 20117105576569. The next prime is 20117105576647. The reversal of 20117105576645 is 54667550171102.

It is not a de Polignac number, because 20117105576645 - 2¹⁰ = 20117105575621 is a prime.

It is a super-3 number, since 3×20117105576645³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20117105576593 and 20117105576602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117105576647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26126110754 + ... + 26126111523.

It is an arithmetic number, because the mean of its divisors is an integer number (1881080002008).

Almost surely, 2^{20117105576645} is an apocalyptic number.

It is an amenable number.

20117105576645 is a deficient number, since it is larger than the sum of its proper divisors (9980174455483).

20117105576645 is a wasteful number, since it uses less digits than its factorization.

20117105576645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52252222300.

The product of its (nonzero) digits is 1764000, while the sum is 50.

The spelling of 20117105576645 in words is "twenty trillion, one hundred seventeen billion, one hundred five million, five hundred seventy-six thousand, six hundred forty-five".