13420244551 has 4 divisors (see below), whose sum is σ = 15337422352. Its totient is φ = 11503066752.

The previous prime is 13420244501. The next prime is 13420244633. The reversal of 13420244551 is 15544202431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13420244551 - 2⁹ = 13420244039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420244501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958588890 + ... + 958588903.

It is an arithmetic number, because the mean of its divisors is an integer number (3834355588).

Almost surely, 2^13420244551 is an apocalyptic number.

13420244551 is a deficient number, since it is larger than the sum of its proper divisors (1917177801).

13420244551 is an equidigital number, since it uses as much as digits as its factorization.

13420244551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917177800.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 13420244551 its reverse (15544202431), we get a palindrome (28964446982).

The spelling of 13420244551 in words is "thirteen billion, four hundred twenty million, two hundred forty-four thousand, five hundred fifty-one".