20209182120 has 48 divisors (see below), whose sum is σ = 65679843060. Its totient is φ = 5389115136.

The previous prime is 20209182113. The next prime is 20209182143. The reversal of 20209182120 is 2128190202.

It can be written as a sum of positive squares in 2 ways, for example, as 20208896964 + 285156 = 142158^2 + 534^2 .

It is a super-2 number, since 2×20209182120² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28067949 + ... + 28068668.

Almost surely, 2^20209182120 is an apocalyptic number.

20209182120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20209182120 is an abundant number, since it is smaller than the sum of its proper divisors (45470660940).

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

20209182120 is a wasteful number, since it uses less digits than its factorization.

20209182120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56136634 (or 56136627 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 20209182120 in words is "twenty billion, two hundred nine million, one hundred eighty-two thousand, one hundred twenty".