20354436540445 has 64 divisors (see below), whose sum is σ = 28596240691200. Its totient is φ = 13621130449920.

The previous prime is 20354436540443. The next prime is 20354436540467. The reversal of 20354436540445 is 54404563445302.

It is not a de Polignac number, because 20354436540445 - 2¹ = 20354436540443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354436540443) 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, 116317426 + ... + 116492284.

It is an arithmetic number, because the mean of its divisors is an integer number (446816260800).

Almost surely, 2^{20354436540445} is an apocalyptic number.

It is an amenable number.

20354436540445 is a deficient number, since it is larger than the sum of its proper divisors (8241804150755).

20354436540445 is a wasteful number, since it uses less digits than its factorization.

20354436540445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175418.

The product of its (nonzero) digits is 13824000, while the sum is 49.

Adding to 20354436540445 its reverse (54404563445302), we get a palindrome (74758999985747).

The spelling of 20354436540445 in words is "twenty trillion, three hundred fifty-four billion, four hundred thirty-six million, five hundred forty thousand, four hundred forty-five".