20980497842641 has 4 divisors (see below), whose sum is σ = 21074580792832. Its totient is φ = 20886414892452.

The previous prime is 20980497842627. The next prime is 20980497842663. The reversal of 20980497842641 is 14624879408902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20980497842641 - 2⁵ = 20980497842609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20980497842341) 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, 47041474761 + ... + 47041475206.

It is an arithmetic number, because the mean of its divisors is an integer number (5268645198208).

Almost surely, 2^{20980497842641} is an apocalyptic number.

It is an amenable number.

20980497842641 is a deficient number, since it is larger than the sum of its proper divisors (94082950191).

20980497842641 is an equidigital number, since it uses as much as digits as its factorization.

20980497842641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94082950190.

The product of its (nonzero) digits is 55738368, while the sum is 64.

The spelling of 20980497842641 in words is "twenty trillion, nine hundred eighty billion, four hundred ninety-seven million, eight hundred forty-two thousand, six hundred forty-one".