21710307355 has 8 divisors (see below), whose sum is σ = 28420766064. Its totient is φ = 15789314400.

The previous prime is 21710307341. The next prime is 21710307391. The reversal of 21710307355 is 55370301712.

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

It is a de Polignac number, because none of the positive numbers 2^k-21710307355 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 21710307355.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197366376 + ... + 197366485.

It is an arithmetic number, because the mean of its divisors is an integer number (3552595758).

Almost surely, 2^21710307355 is an apocalyptic number.

21710307355 is a deficient number, since it is larger than the sum of its proper divisors (6710458709).

21710307355 is a wasteful number, since it uses less digits than its factorization.

21710307355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394732877.

The product of its (nonzero) digits is 22050, while the sum is 34.

The spelling of 21710307355 in words is "twenty-one billion, seven hundred ten million, three hundred seven thousand, three hundred fifty-five".