20826576978641 has 8 divisors (see below), whose sum is σ = 23802224185344. Its totient is φ = 17851035252960.

The previous prime is 20826576978553. The next prime is 20826576978659. The reversal of 20826576978641 is 14687967562802.

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

It is not a de Polignac number, because 20826576978641 - 2²⁶ = 20826509869777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20826576978841) 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, 25946705 + ... + 26737326.

It is an arithmetic number, because the mean of its divisors is an integer number (2975278023168).

Almost surely, 2^{20826576978641} is an apocalyptic number.

It is an amenable number.

20826576978641 is a deficient number, since it is larger than the sum of its proper divisors (2975647206703).

20826576978641 is an equidigital number, since it uses as much as digits as its factorization.

20826576978641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52740511.

The product of its (nonzero) digits is 487710720, while the sum is 71.

The spelling of 20826576978641 in words is "twenty trillion, eight hundred twenty-six billion, five hundred seventy-six million, nine hundred seventy-eight thousand, six hundred forty-one".