20182855320 has 128 divisors (see below), whose sum is σ = 67427640000. Its totient is φ = 5369978880.

The previous prime is 20182855309. The next prime is 20182855321. The reversal of 20182855320 is 2355828102.

20182855320 is a `hidden beast` number, since 2 + 0 + 1 + 82 + 8 + 553 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20182855321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 464110 + ... + 505730.

Almost surely, 2^20182855320 is an apocalyptic number.

20182855320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20182855320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33713820000).

20182855320 is an abundant number, since it is smaller than the sum of its proper divisors (47244784680).

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

20182855320 is a wasteful number, since it uses less digits than its factorization.

20182855320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42090 (or 42080 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 20182855320 in words is "twenty billion, one hundred eighty-two million, eight hundred fifty-five thousand, three hundred twenty".