21400001441 has 16 divisors (see below), whose sum is σ = 26709435648. Its totient is φ = 16693387200.

The previous prime is 21400001417. The next prime is 21400001459. The reversal of 21400001441 is 14410000412.

It is not a de Polignac number, because 21400001441 - 2¹⁸ = 21399739297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21400001461) 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, 1649630 + ... + 1662551.

It is an arithmetic number, because the mean of its divisors is an integer number (1669339728).

Almost surely, 2^21400001441 is an apocalyptic number.

It is an amenable number.

21400001441 is a deficient number, since it is larger than the sum of its proper divisors (5309434207).

21400001441 is a wasteful number, since it uses less digits than its factorization.

21400001441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312272.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21400001441 its reverse (14410000412), we get a palindrome (35810001853).

The spelling of 21400001441 in words is "twenty-one billion, four hundred million, one thousand, four hundred forty-one".