21660410033313 has 16 divisors (see below), whose sum is σ = 29552335302336. Its totient is φ = 14104382423040.

The previous prime is 21660410033291. The next prime is 21660410033329. The reversal of 21660410033313 is 31333001406612.

It is not a de Polignac number, because 21660410033313 - 2²¹ = 21660407936161 is a prime.

It is a super-2 number, since 2×21660410033313² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21660410031313) 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, 41869281 + ... + 42383457.

It is an arithmetic number, because the mean of its divisors is an integer number (1847020956396).

Almost surely, 2^{21660410033313} is an apocalyptic number.

It is an amenable number.

21660410033313 is a deficient number, since it is larger than the sum of its proper divisors (7891925269023).

21660410033313 is a wasteful number, since it uses less digits than its factorization.

21660410033313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840784.

The product of its (nonzero) digits is 23328, while the sum is 33.

Adding to 21660410033313 its reverse (31333001406612), we get a palindrome (52993411439925).

The spelling of 21660410033313 in words is "twenty-one trillion, six hundred sixty billion, four hundred ten million, thirty-three thousand, three hundred thirteen".