21344420003 has 8 divisors (see below), whose sum is σ = 22476775200. Its totient is φ = 20229092928.

The previous prime is 21344419939. The next prime is 21344420017. The reversal of 21344420003 is 30002444312.

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 21344420003 - 2⁶ = 21344419939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344420803) 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, 4254458 + ... + 4259471.

It is an arithmetic number, because the mean of its divisors is an integer number (2809596900).

Almost surely, 2^21344420003 is an apocalyptic number.

21344420003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21344420003 is a deficient number, since it is larger than the sum of its proper divisors (1132355197).

21344420003 is a wasteful number, since it uses less digits than its factorization.

21344420003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8514061.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21344420003 its reverse (30002444312), we get a palindrome (51346864315).

The spelling of 21344420003 in words is "twenty-one billion, three hundred forty-four million, four hundred twenty thousand, three".