20450558743 has 4 divisors (see below), whose sum is σ = 21526903960. Its totient is φ = 19374213528.

The previous prime is 20450558677. The next prime is 20450558759. The reversal of 20450558743 is 34785505402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20450558743 - 2¹³ = 20450550551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20450558743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450558143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538172580 + ... + 538172617.

It is an arithmetic number, because the mean of its divisors is an integer number (5381725990).

Almost surely, 2^20450558743 is an apocalyptic number.

20450558743 is a deficient number, since it is larger than the sum of its proper divisors (1076345217).

20450558743 is a wasteful number, since it uses less digits than its factorization.

20450558743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076345216.

The product of its (nonzero) digits is 672000, while the sum is 43.

The spelling of 20450558743 in words is "twenty billion, four hundred fifty million, five hundred fifty-eight thousand, seven hundred forty-three".