21303310293 has 12 divisors (see below), whose sum is σ = 31117195980. Its totient is φ = 14042630976.

The previous prime is 21303310247. The next prime is 21303310297. The reversal of 21303310293 is 39201330312.

21303310293 is a `hidden beast` number, since 21 + 303 + 310 + 29 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5320535364 + 15982774929 = 72942^2 + 126423^2 .

It is not a de Polignac number, because 21303310293 - 2¹³ = 21303302101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303310297) 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, 13297146 + ... + 13298747.

It is an arithmetic number, because the mean of its divisors is an integer number (2593099665).

Almost surely, 2^21303310293 is an apocalyptic number.

It is an amenable number.

21303310293 is a deficient number, since it is larger than the sum of its proper divisors (9813885687).

21303310293 is a wasteful number, since it uses less digits than its factorization.

21303310293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26595988 (or 26595985 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The spelling of 21303310293 in words is "twenty-one billion, three hundred three million, three hundred ten thousand, two hundred ninety-three".