21144324003 has 16 divisors (see below), whose sum is σ = 30762638976. Its totient is φ = 12811717440.

The previous prime is 21144324001. The next prime is 21144324017. The reversal of 21144324003 is 30042344112.

It is not a de Polignac number, because 21144324003 - 2¹ = 21144324001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21144324001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70551 + ... + 217407.

It is an arithmetic number, because the mean of its divisors is an integer number (1922664936).

Almost surely, 2^21144324003 is an apocalyptic number.

21144324003 is a deficient number, since it is larger than the sum of its proper divisors (9618314973).

21144324003 is a wasteful number, since it uses less digits than its factorization.

21144324003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151234.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21144324003 its reverse (30042344112), we get a palindrome (51186668115).

The spelling of 21144324003 in words is "twenty-one billion, one hundred forty-four million, three hundred twenty-four thousand, three".