21428608303 has 8 divisors (see below), whose sum is σ = 21954559536. Its totient is φ = 20902814400.

The previous prime is 21428608277. The next prime is 21428608319. The reversal of 21428608303 is 30380682412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21428608303 - 2⁹ = 21428607791 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 (21428608373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264925 + ... + 336217.

It is an arithmetic number, because the mean of its divisors is an integer number (2744319942).

Almost surely, 2^21428608303 is an apocalyptic number.

21428608303 is a deficient number, since it is larger than the sum of its proper divisors (525951233).

21428608303 is an equidigital number, since it uses as much as digits as its factorization.

21428608303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78665.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 21428608303 in words is "twenty-one billion, four hundred twenty-eight million, six hundred eight thousand, three hundred three".