21013345413339 has 16 divisors (see below), whose sum is σ = 28676642134272. Its totient is φ = 13679638082208.

The previous prime is 21013345413259. The next prime is 21013345413343. The reversal of 21013345413339 is 93331454331012.

It is a happy number.

It is not a de Polignac number, because 21013345413339 - 2⁷ = 21013345413211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21013345413339.

It is not an unprimeable number, because it can be changed into a prime (21013345413839) 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, 20147472 + ... + 21164765.

It is an arithmetic number, because the mean of its divisors is an integer number (1792290133392).

Almost surely, 2^{21013345413339} is an apocalyptic number.

21013345413339 is a deficient number, since it is larger than the sum of its proper divisors (7663296720933).

21013345413339 is a wasteful number, since it uses less digits than its factorization.

21013345413339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41316226.

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 21013345413339 in words is "twenty-one trillion, thirteen billion, three hundred forty-five million, four hundred thirteen thousand, three hundred thirty-nine".