21400412441 has 8 divisors (see below), whose sum is σ = 21432432000. Its totient is φ = 21368418192.

The previous prime is 21400412417. The next prime is 21400412471. The reversal of 21400412441 is 14421400412.

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 21400412441 - 2⁶ = 21400412377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21400412471) 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, 2240111 + ... + 2249643.

It is an arithmetic number, because the mean of its divisors is an integer number (2679054000).

Almost surely, 2^21400412441 is an apocalyptic number.

It is an amenable number.

21400412441 is a deficient number, since it is larger than the sum of its proper divisors (32019559).

21400412441 is a wasteful number, since it uses less digits than its factorization.

21400412441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12655.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21400412441 its reverse (14421400412), we get a palindrome (35821812853).

The spelling of 21400412441 in words is "twenty-one billion, four hundred million, four hundred twelve thousand, four hundred forty-one".