21343317255 has 96 divisors (see below), whose sum is σ = 41426810880. Its totient is φ = 10094181120.

The previous prime is 21343317241. The next prime is 21343317263. The reversal of 21343317255 is 55271334312.

21343317255 is a `hidden beast` number, since 2 + 1 + 3 + 433 + 172 + 55 = 666.

It is not a de Polignac number, because 21343317255 - 2⁸ = 21343316999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2516532 + ... + 2524998.

It is an arithmetic number, because the mean of its divisors is an integer number (431529280).

Almost surely, 2^21343317255 is an apocalyptic number.

21343317255 is a deficient number, since it is larger than the sum of its proper divisors (20083493625).

21343317255 is a wasteful number, since it uses less digits than its factorization.

21343317255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8661 (or 8658 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The spelling of 21343317255 in words is "twenty-one billion, three hundred forty-three million, three hundred seventeen thousand, two hundred fifty-five".