21403214441344 has 64 divisors (see below), whose sum is σ = 44494216244640. Its totient is φ = 10236062048256.

The previous prime is 21403214441311. The next prime is 21403214441377. The reversal of 21403214441344 is 44314441230412.

It is an interprime number because it is at equal distance from previous prime (21403214441311) and next prime (21403214441377).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171139924 + ... + 171264940.

Almost surely, 2^{21403214441344} is an apocalyptic number.

It is an amenable number.

21403214441344 is an abundant number, since it is smaller than the sum of its proper divisors (23091001803296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21403214441344 is a wasteful number, since it uses less digits than its factorization.

21403214441344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183207 (or 183195 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 37.

Adding to 21403214441344 its reverse (44314441230412), we get a palindrome (65717655671756).

The spelling of 21403214441344 in words is "twenty-one trillion, four hundred three billion, two hundred fourteen million, four hundred forty-one thousand, three hundred forty-four".