21293971308303 has 8 divisors (see below), whose sum is σ = 28394107988400. Its totient is φ = 14194907750208.

The previous prime is 21293971308289. The next prime is 21293971308307. The reversal of 21293971308303 is 30380317939212.

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

It is not a de Polignac number, because 21293971308303 - 2⁴ = 21293971308287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21293971308307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268234198 + ... + 268313571.

It is an arithmetic number, because the mean of its divisors is an integer number (3549263498550).

Almost surely, 2^{21293971308303} is an apocalyptic number.

21293971308303 is a deficient number, since it is larger than the sum of its proper divisors (7100136680097).

21293971308303 is a wasteful number, since it uses less digits than its factorization.

21293971308303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536561001.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The spelling of 21293971308303 in words is "twenty-one trillion, two hundred ninety-three billion, nine hundred seventy-one million, three hundred eight thousand, three hundred three".