220888915806 has 16 divisors (see below), whose sum is σ = 475760741904. Its totient is φ = 67965820224.

The previous prime is 220888915799. The next prime is 220888915813. The reversal of 220888915806 is 608519888022.

It is an interprime number because it is at equal distance from previous prime (220888915799) and next prime (220888915813).

It is a Curzon number.

It is a congruent number.

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, 1415954511 + ... + 1415954666.

It is an arithmetic number, because the mean of its divisors is an integer number (29735046369).

Almost surely, 2^220888915806 is an apocalyptic number.

220888915806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

220888915806 is an abundant number, since it is smaller than the sum of its proper divisors (254871826098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220888915806 is a wasteful number, since it uses less digits than its factorization.

220888915806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831909195.

The product of its (nonzero) digits is 4423680, while the sum is 57.

The spelling of 220888915806 in words is "two hundred twenty billion, eight hundred eighty-eight million, nine hundred fifteen thousand, eight hundred six".