21008939018041 has 8 divisors (see below), whose sum is σ = 22711037912640. Its totient is φ = 19319129646672.

The previous prime is 21008939018033. The next prime is 21008939018059. The reversal of 21008939018041 is 14081093980012.

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 21008939018041 - 2³ = 21008939018033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21008939017982 and 21008939018000.

It is not an unprimeable number, because it can be changed into a prime (21008939018341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3072377251 + ... + 3072384088.

It is an arithmetic number, because the mean of its divisors is an integer number (2838879739080).

Almost surely, 2^{21008939018041} is an apocalyptic number.

It is an amenable number.

21008939018041 is a deficient number, since it is larger than the sum of its proper divisors (1702098894599).

21008939018041 is a wasteful number, since it uses less digits than its factorization.

21008939018041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6144761615.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 21008939018041 in words is "twenty-one trillion, eight billion, nine hundred thirty-nine million, eighteen thousand, forty-one".