21704700265 has 8 divisors (see below), whose sum is σ = 26067119688. Its totient is φ = 17349440640.

The previous prime is 21704700257. The next prime is 21704700271. The reversal of 21704700265 is 56200740712.

It can be written as a sum of positive squares in 4 ways, for example, as 10061584 + 21694638681 = 3172^2 + 147291^2 .

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

It is not a de Polignac number, because 21704700265 - 2³ = 21704700257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21704700265.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1783276 + ... + 1795405.

It is an arithmetic number, because the mean of its divisors is an integer number (3258389961).

Almost surely, 2^21704700265 is an apocalyptic number.

It is an amenable number.

21704700265 is a deficient number, since it is larger than the sum of its proper divisors (4362419423).

21704700265 is a wasteful number, since it uses less digits than its factorization.

21704700265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3579899.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 21704700265 in words is "twenty-one billion, seven hundred four million, seven hundred thousand, two hundred sixty-five".