21203004441 has 8 divisors (see below), whose sum is σ = 28273626784. Its totient is φ = 14133859200.

The previous prime is 21203004413. The next prime is 21203004527. The reversal of 21203004441 is 14440030212.

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

It is not a de Polignac number, because 21203004441 - 2⁶ = 21203004377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203005441) 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, 335335 + ... + 393516.

It is an arithmetic number, because the mean of its divisors is an integer number (3534203348).

Almost surely, 2^21203004441 is an apocalyptic number.

It is an amenable number.

21203004441 is a deficient number, since it is larger than the sum of its proper divisors (7070622343).

21203004441 is an equidigital number, since it uses as much as digits as its factorization.

21203004441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738551.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21203004441 its reverse (14440030212), we get a palindrome (35643034653).

The spelling of 21203004441 in words is "twenty-one billion, two hundred three million, four thousand, four hundred forty-one".