21044004419 has 8 divisors (see below), whose sum is σ = 21751517040. Its totient is φ = 20348186400.

The previous prime is 21044004413. The next prime is 21044004427. The reversal of 21044004419 is 91440044012.

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 21044004419 - 2²⁴ = 21027227203 is a prime.

It is a super-2 number, since 2×21044004419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21044004391 and 21044004400.

It is not an unprimeable number, because it can be changed into a prime (21044004413) 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, 2919992 + ... + 2927189.

It is an arithmetic number, because the mean of its divisors is an integer number (2718939630).

Almost surely, 2^21044004419 is an apocalyptic number.

21044004419 is a deficient number, since it is larger than the sum of its proper divisors (707512621).

21044004419 is an equidigital number, since it uses as much as digits as its factorization.

21044004419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847301.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 21044004419 in words is "twenty-one billion, forty-four million, four thousand, four hundred nineteen".