20427746865494 has 8 divisors (see below), whose sum is σ = 30642350004000. Its totient is φ = 10213630197496.

The previous prime is 20427746865479. The next prime is 20427746865521. The reversal of 20427746865494 is 49456864772402.

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

It is a congruent number.

It is an unprimeable number.

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, 121512629 + ... + 121680624.

It is an arithmetic number, because the mean of its divisors is an integer number (3830293750500).

Almost surely, 2^{20427746865494} is an apocalyptic number.

20427746865494 is a deficient number, since it is larger than the sum of its proper divisors (10214603138506).

20427746865494 is a wasteful number, since it uses less digits than its factorization.

20427746865494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243235254.

The product of its (nonzero) digits is 650280960, while the sum is 68.

The spelling of 20427746865494 in words is "twenty trillion, four hundred twenty-seven billion, seven hundred forty-six million, eight hundred sixty-five thousand, four hundred ninety-four".