220809706 has 16 divisors (see below), whose sum is σ = 372201984. Its totient is φ = 97480944.

The previous prime is 220809629. The next prime is 220809707. The reversal of 220809706 is 607908022.

220809706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (220809707) 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, 184026 + ... + 185221.

It is an arithmetic number, because the mean of its divisors is an integer number (23262624).

Almost surely, 2^220809706 is an apocalyptic number.

220809706 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

220809706 is a deficient number, since it is larger than the sum of its proper divisors (151392278).

220809706 is a wasteful number, since it uses less digits than its factorization.

220809706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369285.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 220809706 is about 14859.6670891376. The cubic root of 220809706 is about 604.4207793348.

The spelling of 220809706 in words is "two hundred twenty million, eight hundred nine thousand, seven hundred six".