21315382704239 has 8 divisors (see below), whose sum is σ = 22958640874512. Its totient is φ = 19672640726400.

The previous prime is 21315382704223. The next prime is 21315382704247. The reversal of 21315382704239 is 93240728351312.

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 21315382704239 - 2⁴ = 21315382704223 is a prime.

It is a super-2 number, since 2×21315382704239² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21315382709239) 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, 128962337 + ... + 129127514.

It is an arithmetic number, because the mean of its divisors is an integer number (2869830109314).

Almost surely, 2^{21315382704239} is an apocalyptic number.

21315382704239 is a deficient number, since it is larger than the sum of its proper divisors (1643258170273).

21315382704239 is a wasteful number, since it uses less digits than its factorization.

21315382704239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258096217.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 21315382704239 in words is "twenty-one trillion, three hundred fifteen billion, three hundred eighty-two million, seven hundred four thousand, two hundred thirty-nine".