220389509871 has 6 divisors (see below), whose sum is σ = 318340403160. Its totient is φ = 146926339908.

The previous prime is 220389509863. The next prime is 220389509897. The reversal of 220389509871 is 178905983022.

220389509871 is a `hidden beast` number, since 2 + 20 + 38 + 9 + 509 + 87 + 1 = 666.

It is not a de Polignac number, because 220389509871 - 2³ = 220389509863 is a prime.

It is a super-2 number, since 2×220389509871² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220389509371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12243861651 + ... + 12243861668.

It is an arithmetic number, because the mean of its divisors is an integer number (53056733860).

Almost surely, 2^220389509871 is an apocalyptic number.

220389509871 is a deficient number, since it is larger than the sum of its proper divisors (97950893289).

220389509871 is a wasteful number, since it uses less digits than its factorization.

220389509871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24487723325 (or 24487723322 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 220389509871 in words is "two hundred twenty billion, three hundred eighty-nine million, five hundred nine thousand, eight hundred seventy-one".