21404311003 has 8 divisors (see below), whose sum is σ = 21502497600. Its totient is φ = 21306165888.

The previous prime is 21404311001. The next prime is 21404311067. The reversal of 21404311003 is 30011340412.

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 21404311003 - 2¹ = 21404311001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21404311001) 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, 1557918 + ... + 1571596.

It is an arithmetic number, because the mean of its divisors is an integer number (2687812200).

Almost surely, 2^21404311003 is an apocalyptic number.

21404311003 is a deficient number, since it is larger than the sum of its proper divisors (98186597).

21404311003 is a wasteful number, since it uses less digits than its factorization.

21404311003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20741.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21404311003 its reverse (30011340412), we get a palindrome (51415651415).

The spelling of 21404311003 in words is "twenty-one billion, four hundred four million, three hundred eleven thousand, three".