20001534110865 has 12 divisors (see below), whose sum is σ = 34669325792244. Its totient is φ = 10667484859104.

The previous prime is 20001534110863. The next prime is 20001534110869. The reversal of 20001534110865 is 56801143510002.

20001534110865 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 1 + 534 + 110 + 8 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3176122780224 + 16825411330641 = 1782168^2 + 4101879^2 .

It is not a de Polignac number, because 20001534110865 - 2¹ = 20001534110863 is a prime.

It is a super-2 number, since 2×20001534110865² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20001534110863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222239267854 + ... + 222239267943.

It is an arithmetic number, because the mean of its divisors is an integer number (2889110482687).

Almost surely, 2^{20001534110865} is an apocalyptic number.

It is an amenable number.

20001534110865 is a deficient number, since it is larger than the sum of its proper divisors (14667791681379).

20001534110865 is a wasteful number, since it uses less digits than its factorization.

20001534110865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444478535808 (or 444478535805 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

Adding to 20001534110865 its reverse (56801143510002), we get a palindrome (76802677620867).

The spelling of 20001534110865 in words is "twenty trillion, one billion, five hundred thirty-four million, one hundred ten thousand, eight hundred sixty-five".