21404414001 has 4 divisors (see below), whose sum is σ = 28539218672. Its totient is φ = 14269609332.

The previous prime is 21404413973. The next prime is 21404414027. The reversal of 21404414001 is 10041440412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21404414001 - 2⁵ = 21404413969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21404414051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3567402331 + ... + 3567402336.

It is an arithmetic number, because the mean of its divisors is an integer number (7134804668).

Almost surely, 2^21404414001 is an apocalyptic number.

It is an amenable number.

21404414001 is a deficient number, since it is larger than the sum of its proper divisors (7134804671).

21404414001 is an equidigital number, since it uses as much as digits as its factorization.

21404414001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134804670.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21404414001 its reverse (10041440412), we get a palindrome (31445854413).

The spelling of 21404414001 in words is "twenty-one billion, four hundred four million, four hundred fourteen thousand, one".