220843921608 has 60 divisors (see below), whose sum is σ = 618600974145. Its totient is φ = 73610652960.

The previous prime is 220843921607. The next prime is 220843921609. The reversal of 220843921608 is 806129348022.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

220843921608 is a `hidden beast` number, since 2 + 2 + 0 + 8 + 4 + 39 + 2 + 1 + 608 = 666.

It is an interprime number because it is at equal distance from previous prime (220843921607) and next prime (220843921609).

It can be written as a sum of positive squares in 2 ways, for example, as 157258247364 + 63585674244 = 396558^2 + 252162^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332298.

It is a super-2 number, since 2×220843921608² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220843921603) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 11953498 + ... + 11971958.

Almost surely, 2^220843921608 is an apocalyptic number.

It is an amenable number.

220843921608 is an abundant number, since it is smaller than the sum of its proper divisors (397757052537).

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

220843921608 is an frugal number, since it uses more digits than its factorization.

220843921608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36940 (or 18466 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 220843921608 in words is "two hundred twenty billion, eight hundred forty-three million, nine hundred twenty-one thousand, six hundred eight".