20470261305 has 64 divisors (see below), whose sum is σ = 35625235968. Its totient is φ = 9977210880.

The previous prime is 20470261283. The next prime is 20470261307. The reversal of 20470261305 is 50316207402.

It is not a de Polignac number, because 20470261305 - 2⁷ = 20470261177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20470261307) 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 63 ways as a sum of consecutive naturals, for example, 9149647 + ... + 9151883.

It is an arithmetic number, because the mean of its divisors is an integer number (556644312).

Almost surely, 2^20470261305 is an apocalyptic number.

It is an amenable number.

20470261305 is a deficient number, since it is larger than the sum of its proper divisors (15154974663).

20470261305 is a wasteful number, since it uses less digits than its factorization.

20470261305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706.

The product of its (nonzero) digits is 10080, while the sum is 30.

Adding to 20470261305 its reverse (50316207402), we get a palindrome (70786468707).

The spelling of 20470261305 in words is "twenty billion, four hundred seventy million, two hundred sixty-one thousand, three hundred five".