20020120 has 64 divisors (see below), whose sum is σ = 48107520. Its totient is φ = 7480704.

The previous prime is 20020109. The next prime is 20020151. The reversal of 20020120 is 2102002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43009 + ... + 43471.

It is an arithmetic number, because the mean of its divisors is an integer number (751680).

Almost surely, 2^20020120 is an apocalyptic number.

20020120 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 20020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24053760).

20020120 is an abundant number, since it is smaller than the sum of its proper divisors (28087400).

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

20020120 is a wasteful number, since it uses less digits than its factorization.

20020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20020120 is about 4474.3848739240. The cubic root of 20020120 is about 271.5327546241.

Adding to 20020120 its reverse (2102002), we get a palindrome (22122122).

The spelling of 20020120 in words is "twenty million, twenty thousand, one hundred twenty".