20352136541565 has 64 divisors (see below), whose sum is σ = 36294716701440. Its totient is φ = 9677991997440.

The previous prime is 20352136541563. The next prime is 20352136541609. The reversal of 20352136541565 is 56514563125302.

It is not a de Polignac number, because 20352136541565 - 2¹ = 20352136541563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20352136541563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 290456635 + ... + 290526695.

It is an arithmetic number, because the mean of its divisors is an integer number (567104948460).

Almost surely, 2^{20352136541565} is an apocalyptic number.

It is an amenable number.

20352136541565 is a deficient number, since it is larger than the sum of its proper divisors (15942580159875).

20352136541565 is a wasteful number, since it uses less digits than its factorization.

20352136541565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130062.

The product of its (nonzero) digits is 3240000, while the sum is 48.

Adding to 20352136541565 its reverse (56514563125302), we get a palindrome (76866699666867).

The spelling of 20352136541565 in words is "twenty trillion, three hundred fifty-two billion, one hundred thirty-six million, five hundred forty-one thousand, five hundred sixty-five".