21608708035 has 16 divisors (see below), whose sum is σ = 27098890560. Its totient is φ = 16510285440.

The previous prime is 21608708021. The next prime is 21608708057. The reversal of 21608708035 is 53080780612.

It is not a de Polignac number, because 21608708035 - 2⁵ = 21608708003 is a prime.

It is a super-2 number, since 2×21608708035² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66120 + ... + 218149.

It is an arithmetic number, because the mean of its divisors is an integer number (1693680660).

Almost surely, 2^21608708035 is an apocalyptic number.

21608708035 is a deficient number, since it is larger than the sum of its proper divisors (5490182525).

21608708035 is a wasteful number, since it uses less digits than its factorization.

21608708035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284958.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 21608708035 in words is "twenty-one billion, six hundred eight million, seven hundred eight thousand, thirty-five".