13420053021 has 32 divisors (see below), whose sum is σ = 18931138560. Its totient is φ = 8442386624.

The previous prime is 13420053013. The next prime is 13420053029. The reversal of 13420053021 is 12035002431.

It is an interprime number because it is at equal distance from previous prime (13420053013) and next prime (13420053029).

It is a cyclic number.

It is not a de Polignac number, because 13420053021 - 2³ = 13420053013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420053029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3526906 + ... + 3530708.

It is an arithmetic number, because the mean of its divisors is an integer number (591598080).

Almost surely, 2^13420053021 is an apocalyptic number.

It is an amenable number.

13420053021 is a deficient number, since it is larger than the sum of its proper divisors (5511085539).

13420053021 is a wasteful number, since it uses less digits than its factorization.

13420053021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745.

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

Adding to 13420053021 its reverse (12035002431), we get a palindrome (25455055452).

The spelling of 13420053021 in words is "thirteen billion, four hundred twenty million, fifty-three thousand, twenty-one".