21044004398 has 8 divisors (see below), whose sum is σ = 31715609160. Its totient is φ = 10472134680.

The previous prime is 21044004361. The next prime is 21044004413. The reversal of 21044004398 is 89340044012.

21044004398 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21044004398² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24933233 + ... + 24934076.

It is an arithmetic number, because the mean of its divisors is an integer number (3964451145).

Almost surely, 2^21044004398 is an apocalyptic number.

21044004398 is a deficient number, since it is larger than the sum of its proper divisors (10671604762).

21044004398 is a wasteful number, since it uses less digits than its factorization.

21044004398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49867522.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 21044004398 in words is "twenty-one billion, forty-four million, four thousand, three hundred ninety-eight".