20847726581747 has 8 divisors (see below), whose sum is σ = 22612918707120. Its totient is φ = 19105608863520.

The previous prime is 20847726581707. The next prime is 20847726581789. The reversal of 20847726581747 is 74718562774802.

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 20847726581747 - 2²⁰ = 20847725533171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20847726581707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5768599904 + ... + 5768603517.

It is an arithmetic number, because the mean of its divisors is an integer number (2826614838390).

Almost surely, 2^{20847726581747} is an apocalyptic number.

20847726581747 is a deficient number, since it is larger than the sum of its proper divisors (1765192125373).

20847726581747 is a wasteful number, since it uses less digits than its factorization.

20847726581747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11537203573.

The product of its (nonzero) digits is 295034880, while the sum is 68.

The spelling of 20847726581747 in words is "twenty trillion, eight hundred forty-seven billion, seven hundred twenty-six million, five hundred eighty-one thousand, seven hundred forty-seven".