21344254545361 has 8 divisors (see below), whose sum is σ = 23284973041344. Its totient is φ = 19403591335920.

The previous prime is 21344254545329. The next prime is 21344254545403. The reversal of 21344254545361 is 16354545244312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21344254545361 - 2⁵ = 21344254545329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344254545661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13012341 + ... + 14560546.

It is an arithmetic number, because the mean of its divisors is an integer number (2910621630168).

Almost surely, 2^{21344254545361} is an apocalyptic number.

It is an amenable number.

21344254545361 is a deficient number, since it is larger than the sum of its proper divisors (1940718495983).

21344254545361 is a wasteful number, since it uses less digits than its factorization.

21344254545361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27643271.

The product of its digits is 6912000, while the sum is 49.

Adding to 21344254545361 its reverse (16354545244312), we get a palindrome (37698799789673).

The spelling of 21344254545361 in words is "twenty-one trillion, three hundred forty-four billion, two hundred fifty-four million, five hundred forty-five thousand, three hundred sixty-one".