14065400821 has 4 divisors (see below), whose sum is σ = 14067676000. Its totient is φ = 14063125644.

The previous prime is 14065400803. The next prime is 14065400861. The reversal of 14065400821 is 12800456041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12800456041 = 23 ⋅556541567.

It is a cyclic number.

It is not a de Polignac number, because 14065400821 - 2¹¹ = 14065398773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14065400861) 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, 1128291 + ... + 1140688.

It is an arithmetic number, because the mean of its divisors is an integer number (3516919000).

Almost surely, 2^14065400821 is an apocalyptic number.

It is an amenable number.

14065400821 is a deficient number, since it is larger than the sum of its proper divisors (2275179).

14065400821 is an equidigital number, since it uses as much as digits as its factorization.

14065400821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275178.

The product of its (nonzero) digits is 7680, while the sum is 31.

Adding to 14065400821 its reverse (12800456041), we get a palindrome (26865856862).

The spelling of 14065400821 in words is "fourteen billion, sixty-five million, four hundred thousand, eight hundred twenty-one".