21450544142303 has 2 divisors, whose sum is σ = 21450544142304. Its totient is φ = 21450544142302.

The previous prime is 21450544142281. The next prime is 21450544142327. The reversal of 21450544142303 is 30324144505412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21450544142303 - 2¹² = 21450544138207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21450544142333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10725272071151 + 10725272071152.

It is an arithmetic number, because the mean of its divisors is an integer number (10725272071152).

Almost surely, 2^{21450544142303} is an apocalyptic number.

21450544142303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21450544142303 is an equidigital number, since it uses as much as digits as its factorization.

21450544142303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 21450544142303 its reverse (30324144505412), we get a palindrome (51774688647715).

The spelling of 21450544142303 in words is "twenty-one trillion, four hundred fifty billion, five hundred forty-four million, one hundred forty-two thousand, three hundred three".