21239054303 has 2 divisors, whose sum is σ = 21239054304. Its totient is φ = 21239054302.

The previous prime is 21239054293. The next prime is 21239054321. The reversal of 21239054303 is 30345093212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21239054303 - 2²⁰ = 21238005727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21239054303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21239054383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10619527151 + 10619527152.

It is an arithmetic number, because the mean of its divisors is an integer number (10619527152).

Almost surely, 2^21239054303 is an apocalyptic number.

21239054303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21239054303 is an equidigital number, since it uses as much as digits as its factorization.

21239054303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The spelling of 21239054303 in words is "twenty-one billion, two hundred thirty-nine million, fifty-four thousand, three hundred three".