13442400421 has 16 divisors (see below), whose sum is σ = 14702443200. Its totient is φ = 12241490688.

The previous prime is 13442400353. The next prime is 13442400427. The reversal of 13442400421 is 12400424431.

It is a cyclic number.

It is not a de Polignac number, because 13442400421 - 2²¹ = 13440303269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13442400427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71341 + ... + 178813.

It is an arithmetic number, because the mean of its divisors is an integer number (918902700).

Almost surely, 2^13442400421 is an apocalyptic number.

It is an amenable number.

13442400421 is a deficient number, since it is larger than the sum of its proper divisors (1260042779).

13442400421 is a wasteful number, since it uses less digits than its factorization.

13442400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107748.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 13442400421 its reverse (12400424431), we get a palindrome (25842824852).

The spelling of 13442400421 in words is "thirteen billion, four hundred forty-two million, four hundred thousand, four hundred twenty-one".