13420421653 has 4 divisors (see below), whose sum is σ = 13422296160. Its totient is φ = 13418547148.

The previous prime is 13420421629. The next prime is 13420421657. The reversal of 13420421653 is 35612402431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13420421653 - 2²¹ = 13418324501 is a prime.

It is a super-2 number, since 2×13420421653² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420421657) 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 3 ways as a sum of consecutive naturals, for example, 926473 + ... + 940846.

It is an arithmetic number, because the mean of its divisors is an integer number (3355574040).

Almost surely, 2^13420421653 is an apocalyptic number.

It is an amenable number.

13420421653 is a deficient number, since it is larger than the sum of its proper divisors (1874507).

13420421653 is an equidigital number, since it uses as much as digits as its factorization.

13420421653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874506.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 13420421653 in words is "thirteen billion, four hundred twenty million, four hundred twenty-one thousand, six hundred fifty-three".