21312713335 has 8 divisors (see below), whose sum is σ = 25687923696. Its totient is φ = 16975058880.

The previous prime is 21312713329. The next prime is 21312713339. The reversal of 21312713335 is 53331721312.

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

It is not a de Polignac number, because 21312713335 - 2³ = 21312713327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21312713297 and 21312713306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312713339) 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, 9387726 + ... + 9389995.

It is an arithmetic number, because the mean of its divisors is an integer number (3210990462).

Almost surely, 2^21312713335 is an apocalyptic number.

21312713335 is a deficient number, since it is larger than the sum of its proper divisors (4375210361).

21312713335 is a wasteful number, since it uses less digits than its factorization.

21312713335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18777953.

The product of its digits is 11340, while the sum is 31.

The spelling of 21312713335 in words is "twenty-one billion, three hundred twelve million, seven hundred thirteen thousand, three hundred thirty-five".