20751670242271 has 4 divisors (see below), whose sum is σ = 20751716429032. Its totient is φ = 20751624055512.

The previous prime is 20751670242253. The next prime is 20751670242341. The reversal of 20751670242271 is 17224207615702.

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

It is a cyclic number.

It is not a de Polignac number, because 20751670242271 - 2⁴¹ = 18552646986719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20751673242271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22412745 + ... + 23320258.

It is an arithmetic number, because the mean of its divisors is an integer number (5187929107258).

Almost surely, 2^{20751670242271} is an apocalyptic number.

20751670242271 is a deficient number, since it is larger than the sum of its proper divisors (46186761).

20751670242271 is an equidigital number, since it uses as much as digits as its factorization.

20751670242271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46186760.

The product of its (nonzero) digits is 658560, while the sum is 46.

Adding to 20751670242271 its reverse (17224207615702), we get a palindrome (37975877857973).

The spelling of 20751670242271 in words is "twenty trillion, seven hundred fifty-one billion, six hundred seventy million, two hundred forty-two thousand, two hundred seventy-one".