20474716505 has 4 divisors (see below), whose sum is σ = 24569659812. Its totient is φ = 16379773200.

The previous prime is 20474716477. The next prime is 20474716543. The reversal of 20474716505 is 50561747402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3949871104 + 16524845401 = 62848^2 + 128549^2 .

It is not a de Polignac number, because 20474716505 - 2⁶ = 20474716441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2047471646 + ... + 2047471655.

It is an arithmetic number, because the mean of its divisors is an integer number (6142414953).

Almost surely, 2^20474716505 is an apocalyptic number.

It is an amenable number.

20474716505 is a deficient number, since it is larger than the sum of its proper divisors (4094943307).

20474716505 is an equidigital number, since it uses as much as digits as its factorization.

20474716505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094943306.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 20474716505 in words is "twenty billion, four hundred seventy-four million, seven hundred sixteen thousand, five hundred five".