21414444401 has 8 divisors (see below), whose sum is σ = 24482966784. Its totient is φ = 18348251040.

The previous prime is 21414444397. The next prime is 21414444421. The reversal of 21414444401 is 10444441412.

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 21414444401 - 2² = 21414444397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21414444421) 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, 562505 + ... + 599366.

It is an arithmetic number, because the mean of its divisors is an integer number (3060370848).

Almost surely, 2^21414444401 is an apocalyptic number.

It is an amenable number.

21414444401 is a deficient number, since it is larger than the sum of its proper divisors (3068522383).

21414444401 is a wasteful number, since it uses less digits than its factorization.

21414444401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164511.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 21414444401 its reverse (10444441412), we get a palindrome (31858885813).

The spelling of 21414444401 in words is "twenty-one billion, four hundred fourteen million, four hundred forty-four thousand, four hundred one".