21400411441 has 16 divisors (see below), whose sum is σ = 22432278528. Its totient is φ = 20395544400.

The previous prime is 21400411369. The next prime is 21400411451. The reversal of 21400411441 is 14411400412.

It is a cyclic number.

It is not a de Polignac number, because 21400411441 - 2⁷ = 21400411313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21400411451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652956 + ... + 684946.

It is an arithmetic number, because the mean of its divisors is an integer number (1402017408).

Almost surely, 2^21400411441 is an apocalyptic number.

It is an amenable number.

21400411441 is a deficient number, since it is larger than the sum of its proper divisors (1031867087).

21400411441 is a wasteful number, since it uses less digits than its factorization.

21400411441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32412.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21400411441 its reverse (14411400412), we get a palindrome (35811811853).

The spelling of 21400411441 in words is "twenty-one billion, four hundred million, four hundred eleven thousand, four hundred forty-one".