20165055220 has 48 divisors (see below), whose sum is σ = 43549083648. Its totient is φ = 7839827840.

The previous prime is 20165055217. The next prime is 20165055221. The reversal of 20165055220 is 2255056102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165055221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24525 + ... + 202315.

It is an arithmetic number, because the mean of its divisors is an integer number (907272576).

Almost surely, 2^20165055220 is an apocalyptic number.

20165055220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20165055220 is an abundant number, since it is smaller than the sum of its proper divisors (23384028428).

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

20165055220 is a wasteful number, since it uses less digits than its factorization.

20165055220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177960 (or 177958 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20165055220 in words is "twenty billion, one hundred sixty-five million, fifty-five thousand, two hundred twenty".