21063792903841 has 4 divisors (see below), whose sum is σ = 21104222449284. Its totient is φ = 21023363358400.

The previous prime is 21063792903823. The next prime is 21063792903997. The reversal of 21063792903841 is 14830929736012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6617864295441 + 14445928608400 = 2572521^2 + 3800780^2 .

It is a cyclic number.

It is not a de Polignac number, because 21063792903841 - 2⁵ = 21063792903809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21063292903841) 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, 20214771940 + ... + 20214772981.

It is an arithmetic number, because the mean of its divisors is an integer number (5276055612321).

Almost surely, 2^{21063792903841} is an apocalyptic number.

It is an amenable number.

21063792903841 is a deficient number, since it is larger than the sum of its proper divisors (40429545443).

21063792903841 is an equidigital number, since it uses as much as digits as its factorization.

21063792903841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40429545442.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 21063792903841 in words is "twenty-one trillion, sixty-three billion, seven hundred ninety-two million, nine hundred three thousand, eight hundred forty-one".