21114140405 has 8 divisors (see below), whose sum is σ = 25573763232. Its totient is φ = 16733449168.

The previous prime is 21114140401. The next prime is 21114140423. The reversal of 21114140405 is 50404141112.

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

It is a cyclic number.

It is not a de Polignac number, because 21114140405 - 2² = 21114140401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114140401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19732307 + ... + 19733376.

It is an arithmetic number, because the mean of its divisors is an integer number (3196720404).

Almost surely, 2^21114140405 is an apocalyptic number.

It is an amenable number.

21114140405 is a deficient number, since it is larger than the sum of its proper divisors (4459622827).

21114140405 is a wasteful number, since it uses less digits than its factorization.

21114140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39465795.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 21114140405 its reverse (50404141112), we get a palindrome (71518281517).

The spelling of 21114140405 in words is "twenty-one billion, one hundred fourteen million, one hundred forty thousand, four hundred five".