20103540565 has 8 divisors (see below), whose sum is σ = 24314204160. Its totient is φ = 15956195472.

The previous prime is 20103540547. The next prime is 20103540571. The reversal of 20103540565 is 56504530102.

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 20103540565 - 2¹¹ = 20103538517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15828925 + ... + 15830194.

It is an arithmetic number, because the mean of its divisors is an integer number (3039275520).

Almost surely, 2^20103540565 is an apocalyptic number.

It is an amenable number.

20103540565 is a deficient number, since it is larger than the sum of its proper divisors (4210663595).

20103540565 is a wasteful number, since it uses less digits than its factorization.

20103540565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31659251.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 20103540565 in words is "twenty billion, one hundred three million, five hundred forty thousand, five hundred sixty-five".