21064445103 has 12 divisors (see below), whose sum is σ = 30412572360. Its totient is φ = 12962735136.

The previous prime is 21064445081. The next prime is 21064445113. The reversal of 21064445103 is 30154446012.

It is not a de Polignac number, because 21064445103 - 2⁵ = 21064445071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21064445113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20773108 + ... + 20774121.

It is an arithmetic number, because the mean of its divisors is an integer number (2534381030).

Almost surely, 2^21064445103 is an apocalyptic number.

21064445103 is a deficient number, since it is larger than the sum of its proper divisors (9348127257).

21064445103 is a wasteful number, since it uses less digits than its factorization.

21064445103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41547258 (or 41547245 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Subtracting 21064445103 from its reverse (30154446012), we obtain a palindrome (9090000909).

The spelling of 21064445103 in words is "twenty-one billion, sixty-four million, four hundred forty-five thousand, one hundred three".