20579707508 has 6 divisors (see below), whose sum is σ = 36014488146. Its totient is φ = 10289853752.

The previous prime is 20579707487. The next prime is 20579707529. The reversal of 20579707508 is 80570797502.

It is an interprime number because it is at equal distance from previous prime (20579707487) and next prime (20579707529).

It can be written as a sum of positive squares in only one way, i.e., 19873104784 + 706602724 = 140972^2 + 26582^2 .

It is a super-2 number, since 2×20579707508² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2572463435 + ... + 2572463442.

It is an arithmetic number, because the mean of its divisors is an integer number (6002414691).

Almost surely, 2^20579707508 is an apocalyptic number.

It is an amenable number.

20579707508 is a deficient number, since it is larger than the sum of its proper divisors (15434780638).

20579707508 is a wasteful number, since it uses less digits than its factorization.

20579707508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5144926881 (or 5144926879 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 50.

The spelling of 20579707508 in words is "twenty billion, five hundred seventy-nine million, seven hundred seven thousand, five hundred eight".