21603343465263 has 16 divisors (see below), whose sum is σ = 32947931622656. Its totient is φ = 12334061030400.

The previous prime is 21603343465057. The next prime is 21603343465273. The reversal of 21603343465263 is 36256434330612.

It is not a de Polignac number, because 21603343465263 - 2¹⁷ = 21603343334191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603343465273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446086213 + ... + 446134638.

It is an arithmetic number, because the mean of its divisors is an integer number (2059245726416).

Almost surely, 2^{21603343465263} is an apocalyptic number.

21603343465263 is a deficient number, since it is larger than the sum of its proper divisors (11344588157393).

21603343465263 is a wasteful number, since it uses less digits than its factorization.

21603343465263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892222014.

The product of its (nonzero) digits is 5598720, while the sum is 48.

Adding to 21603343465263 its reverse (36256434330612), we get a palindrome (57859777795875).

The spelling of 21603343465263 in words is "twenty-one trillion, six hundred three billion, three hundred forty-three million, four hundred sixty-five thousand, two hundred sixty-three".