20615130717 has 4 divisors (see below), whose sum is σ = 27486840960. Its totient is φ = 13743420476.

The previous prime is 20615130707. The next prime is 20615130721. The reversal of 20615130717 is 71703151602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20615130717 - 2⁷ = 20615130589 is a prime.

It is a super-2 number, since 2×20615130717² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20615130707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3435855117 + ... + 3435855122.

It is an arithmetic number, because the mean of its divisors is an integer number (6871710240).

Almost surely, 2^20615130717 is an apocalyptic number.

It is an amenable number.

20615130717 is a deficient number, since it is larger than the sum of its proper divisors (6871710243).

20615130717 is an equidigital number, since it uses as much as digits as its factorization.

20615130717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6871710242.

The product of its (nonzero) digits is 8820, while the sum is 33.

The spelling of 20615130717 in words is "twenty billion, six hundred fifteen million, one hundred thirty thousand, seven hundred seventeen".