20240203643565 has 64 divisors (see below), whose sum is σ = 33102290817024. Its totient is φ = 10557857426688.

The previous prime is 20240203643557. The next prime is 20240203643579. The reversal of 20240203643565 is 56534630204202.

It is not a de Polignac number, because 20240203643565 - 2³ = 20240203643557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 209332362 + ... + 209429028.

It is an arithmetic number, because the mean of its divisors is an integer number (517223294016).

Almost surely, 2^{20240203643565} is an apocalyptic number.

It is an amenable number.

20240203643565 is a deficient number, since it is larger than the sum of its proper divisors (12862087173459).

20240203643565 is a wasteful number, since it uses less digits than its factorization.

20240203643565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98226.

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 20240203643565 its reverse (56534630204202), we get a palindrome (76774833847767).

The spelling of 20240203643565 in words is "twenty trillion, two hundred forty billion, two hundred three million, six hundred forty-three thousand, five hundred sixty-five".