20715508106 has 8 divisors (see below), whose sum is σ = 31119162660. Its totient is φ = 10342453888.

The previous prime is 20715508103. The next prime is 20715508109. The reversal of 20715508106 is 60180551702.

It is an interprime number because it is at equal distance from previous prime (20715508103) and next prime (20715508109).

It can be written as a sum of positive squares in 2 ways, for example, as 20032156225 + 683351881 = 141535^2 + 26141^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20715508103) 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, 7648391 + ... + 7651098.

Almost surely, 2^20715508106 is an apocalyptic number.

20715508106 is a deficient number, since it is larger than the sum of its proper divisors (10403654554).

20715508106 is a wasteful number, since it uses less digits than its factorization.

20715508106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15300168.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 20715508106 in words is "twenty billion, seven hundred fifteen million, five hundred eight thousand, one hundred six".