21341005265173 has 16 divisors (see below), whose sum is σ = 24439423518720. Its totient is φ = 18456856268400.

The previous prime is 21341005265171. The next prime is 21341005265221. The reversal of 21341005265173 is 37156250014312.

It is not a de Polignac number, because 21341005265173 - 2¹ = 21341005265171 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341005265171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530349315 + ... + 530389552.

It is an arithmetic number, because the mean of its divisors is an integer number (1527463969920).

Almost surely, 2^{21341005265173} is an apocalyptic number.

It is an amenable number.

21341005265173 is a deficient number, since it is larger than the sum of its proper divisors (3098418253547).

21341005265173 is a wasteful number, since it uses less digits than its factorization.

21341005265173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060738968.

The product of its (nonzero) digits is 151200, while the sum is 40.

Adding to 21341005265173 its reverse (37156250014312), we get a palindrome (58497255279485).

The spelling of 21341005265173 in words is "twenty-one trillion, three hundred forty-one billion, five million, two hundred sixty-five thousand, one hundred seventy-three".