20617056115 has 4 divisors (see below), whose sum is σ = 24740467344. Its totient is φ = 16493644888.

The previous prime is 20617056091. The next prime is 20617056139. The reversal of 20617056115 is 51165071602.

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

It is an interprime number because it is at equal distance from previous prime (20617056091) and next prime (20617056139).

It is a cyclic number.

It is not a de Polignac number, because 20617056115 - 2²¹ = 20614958963 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, 2061705607 + ... + 2061705616.

It is an arithmetic number, because the mean of its divisors is an integer number (6185116836).

Almost surely, 2^20617056115 is an apocalyptic number.

20617056115 is a deficient number, since it is larger than the sum of its proper divisors (4123411229).

20617056115 is an equidigital number, since it uses as much as digits as its factorization.

20617056115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123411228.

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 20617056115 in words is "twenty billion, six hundred seventeen million, fifty-six thousand, one hundred fifteen".