21337133173313 has 16 divisors (see below), whose sum is σ = 21830975193600. Its totient is φ = 20844986558016.

The previous prime is 21337133173303. The next prime is 21337133173319. The reversal of 21337133173313 is 31337133173312.

It is a cyclic number.

It is not a de Polignac number, because 21337133173313 - 2⁶ = 21337133173249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21337133173319) 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, 56963963 + ... + 57337311.

It is an arithmetic number, because the mean of its divisors is an integer number (1364435949600).

Almost surely, 2^{21337133173313} is an apocalyptic number.

It is an amenable number.

21337133173313 is a deficient number, since it is larger than the sum of its proper divisors (493842020287).

21337133173313 is a wasteful number, since it uses less digits than its factorization.

21337133173313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375616.

The product of its digits is 214326, while the sum is 41.

Subtracting 21337133173313 from its reverse (31337133173312), we obtain a palindrome (9999999999999).

The spelling of 21337133173313 in words is "twenty-one trillion, three hundred thirty-seven billion, one hundred thirty-three million, one hundred seventy-three thousand, three hundred thirteen".