13395200021 has 24 divisors (see below), whose sum is σ = 16555214520. Its totient is φ = 10786027392.

The previous prime is 13395200003. The next prime is 13395200059. The reversal of 13395200021 is 12000259331.

It can be written as a sum of positive squares in 4 ways, for example, as 8759088100 + 4636111921 = 93590^2 + 68089^2 .

It is not a de Polignac number, because 13395200021 - 2⁶ = 13395199957 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 (13395200521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74810 + ... + 179963.

It is an arithmetic number, because the mean of its divisors is an integer number (689800605).

Almost surely, 2^13395200021 is an apocalyptic number.

It is an amenable number.

13395200021 is a deficient number, since it is larger than the sum of its proper divisors (3160014499).

13395200021 is a wasteful number, since it uses less digits than its factorization.

13395200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254853 (or 254846 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

Adding to 13395200021 its reverse (12000259331), we get a palindrome (25395459352).

The spelling of 13395200021 in words is "thirteen billion, three hundred ninety-five million, two hundred thousand, twenty-one".