21404411001 has 32 divisors (see below), whose sum is σ = 32755645440. Its totient is φ = 13799808000.

The previous prime is 21404410999. The next prime is 21404411009. The reversal of 21404411001 is 10011440412.

21404411001 is a `hidden beast` number, since 214 + 0 + 441 + 10 + 0 + 1 = 666.

It is not a de Polignac number, because 21404411001 - 2¹ = 21404410999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21404411009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1332051 + ... + 1348023.

It is an arithmetic number, because the mean of its divisors is an integer number (1023613920).

Almost surely, 2^21404411001 is an apocalyptic number.

It is an amenable number.

21404411001 is a deficient number, since it is larger than the sum of its proper divisors (11351234439).

21404411001 is a wasteful number, since it uses less digits than its factorization.

21404411001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17614 (or 17608 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21404411001 its reverse (10011440412), we get a palindrome (31415851413).

The spelling of 21404411001 in words is "twenty-one billion, four hundred four million, four hundred eleven thousand, one".