21606170270 has 16 divisors (see below), whose sum is σ = 39624901920. Its totient is φ = 8479402464.

The previous prime is 21606170263. The next prime is 21606170273. The reversal of 21606170270 is 7207160612.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21606170273) 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, 20382650 + ... + 20383709.

It is an arithmetic number, because the mean of its divisors is an integer number (2476556370).

Almost surely, 2^21606170270 is an apocalyptic number.

21606170270 is a deficient number, since it is larger than the sum of its proper divisors (18018731650).

21606170270 is a wasteful number, since it uses less digits than its factorization.

21606170270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40766419.

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 21606170270 in words is "twenty-one billion, six hundred six million, one hundred seventy thousand, two hundred seventy".