20634165616105 has 8 divisors (see below), whose sum is σ = 24786342653832. Its totient is φ = 16490436549888.

The previous prime is 20634165616093. The next prime is 20634165616117. The reversal of 20634165616105 is 50161656143602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20634165616093) and next prime (20634165616117).

It can be written as a sum of positive squares in 4 ways, for example, as 7602874243561 + 13031291372544 = 2757331^2 + 3609888^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20634165616105 - 2⁵ = 20634165616073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2111987502 + ... + 2111997271.

It is an arithmetic number, because the mean of its divisors is an integer number (3098292831729).

Almost surely, 2^{20634165616105} is an apocalyptic number.

It is an amenable number.

20634165616105 is a deficient number, since it is larger than the sum of its proper divisors (4152177037727).

20634165616105 is an equidigital number, since it uses as much as digits as its factorization.

20634165616105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223985755.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 20634165616105 in words is "twenty trillion, six hundred thirty-four billion, one hundred sixty-five million, six hundred sixteen thousand, one hundred five".