20440539583245 has 54 divisors (see below), whose sum is σ = 37038955004142. Its totient is φ = 10427281728864.

The previous prime is 20440539583237. The next prime is 20440539583267. The reversal of 20440539583245 is 54238593504402.

20440539583245 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 0 + 5 + 39 + 583 + 24 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16352431666596 + 4088107916649 = 4043814^2 + 2021907^2 .

It is not a de Polignac number, because 20440539583245 - 2³ = 20440539583237 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20440539583191 and 20440539583200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 697543264 + ... + 697572566.

Almost surely, 2^{20440539583245} is an apocalyptic number.

It is an amenable number.

20440539583245 is a deficient number, since it is larger than the sum of its proper divisors (16598415420897).

20440539583245 is an frugal number, since it uses more digits than its factorization.

20440539583245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58663 (or 29334 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 54.

The spelling of 20440539583245 in words is "twenty trillion, four hundred forty billion, five hundred thirty-nine million, five hundred eighty-three thousand, two hundred forty-five".