13045320021 has 16 divisors (see below), whose sum is σ = 18457643520. Its totient is φ = 8177756400.

The previous prime is 13045320019. The next prime is 13045320037. The reversal of 13045320021 is 12002354031.

13045320021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13045320021 - 2¹ = 13045320019 is a prime.

It is a super-3 number, since 3×13045320021³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13045320021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13045320011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1598155 + ... + 1606296.

It is an arithmetic number, because the mean of its divisors is an integer number (1153602720).

Almost surely, 2^13045320021 is an apocalyptic number.

It is an amenable number.

13045320021 is a deficient number, since it is larger than the sum of its proper divisors (5412323499).

13045320021 is a wasteful number, since it uses less digits than its factorization.

13045320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204536.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 13045320021 its reverse (12002354031), we get a palindrome (25047674052).

The spelling of 13045320021 in words is "thirteen billion, forty-five million, three hundred twenty thousand, twenty-one".