21403214344 has 16 divisors (see below), whose sum is σ = 40207767120. Its totient is φ = 10681143120.

The previous prime is 21403214311. The next prime is 21403214347. The reversal of 21403214344 is 44341230412.

It is not an unprimeable number, because it can be changed into a prime (21403214347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2553562 + ... + 2561929.

It is an arithmetic number, because the mean of its divisors is an integer number (2512985445).

Almost surely, 2^21403214344 is an apocalyptic number.

It is an amenable number.

21403214344 is a deficient number, since it is larger than the sum of its proper divisors (18804552776).

21403214344 is a wasteful number, since it uses less digits than its factorization.

21403214344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116020 (or 5116016 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21403214344 its reverse (44341230412), we get a palindrome (65744444756).

The spelling of 21403214344 in words is "twenty-one billion, four hundred three million, two hundred fourteen thousand, three hundred forty-four".