20427746865495 has 24 divisors (see below), whose sum is σ = 33591631694544. Its totient is φ = 10600344308736.

The previous prime is 20427746865479. The next prime is 20427746865521. The reversal of 20427746865495 is 59456864772402.

It is not a de Polignac number, because 20427746865495 - 2⁴ = 20427746865479 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 497367994 + ... + 497409063.

It is an arithmetic number, because the mean of its divisors is an integer number (1399651320606).

Almost surely, 2^{20427746865495} is an apocalyptic number.

20427746865495 is a deficient number, since it is larger than the sum of its proper divisors (13163884829049).

20427746865495 is an equidigital number, since it uses as much as digits as its factorization.

20427746865495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994777139 (or 994777102 counting only the distinct ones).

The product of its (nonzero) digits is 812851200, while the sum is 69.

The spelling of 20427746865495 in words is "twenty trillion, four hundred twenty-seven billion, seven hundred forty-six million, eight hundred sixty-five thousand, four hundred ninety-five".