21400344003 has 8 divisors (see below), whose sum is σ = 28553038528. Its totient is φ = 14257272744.

The previous prime is 21400344001. The next prime is 21400344011. The reversal of 21400344003 is 30044300412.

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

It is not a de Polignac number, because 21400344003 - 2¹ = 21400344001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21400344001) 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, 2400625 + ... + 2409522.

It is an arithmetic number, because the mean of its divisors is an integer number (3569129816).

Almost surely, 2^21400344003 is an apocalyptic number.

21400344003 is a deficient number, since it is larger than the sum of its proper divisors (7152694525).

21400344003 is a wasteful number, since it uses less digits than its factorization.

21400344003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811633.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21400344003 its reverse (30044300412), we get a palindrome (51444644415).

The spelling of 21400344003 in words is "twenty-one billion, four hundred million, three hundred forty-four thousand, three".