21441214405 has 16 divisors (see below), whose sum is σ = 27735402240. Its totient is φ = 15818223168.

The previous prime is 21441214393. The next prime is 21441214433. The reversal of 21441214405 is 50441214412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21441214405 - 2¹¹ = 21441212357 is a prime.

It is a super-2 number, since 2×21441214405² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91207 + ... + 226276.

It is an arithmetic number, because the mean of its divisors is an integer number (1733462640).

Almost surely, 2^21441214405 is an apocalyptic number.

It is an amenable number.

21441214405 is a deficient number, since it is larger than the sum of its proper divisors (6294187835).

21441214405 is a wasteful number, since it uses less digits than its factorization.

21441214405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318540.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 21441214405 its reverse (50441214412), we get a palindrome (71882428817).

The spelling of 21441214405 in words is "twenty-one billion, four hundred forty-one million, two hundred fourteen thousand, four hundred five".