20124120 has 64 divisors (see below), whose sum is σ = 61297920. Its totient is φ = 5284224.

The previous prime is 20124113. The next prime is 20124127. The reversal of 20124120 is 2142102.

It is an interprime number because it is at equal distance from previous prime (20124113) and next prime (20124127).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20124096 and 20124105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6789 + ... + 9291.

It is an arithmetic number, because the mean of its divisors is an integer number (957780).

Almost surely, 2^20124120 is an apocalyptic number.

20124120 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 20124120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30648960).

20124120 is an abundant number, since it is smaller than the sum of its proper divisors (41173800).

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

20124120 is a wasteful number, since it uses less digits than its factorization.

20124120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584 (or 2580 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20124120 is about 4485.9915291940. The cubic root of 20124120 is about 272.0021265693.

Adding to 20124120 its reverse (2142102), we get a palindrome (22266222).

The spelling of 20124120 in words is "twenty million, one hundred twenty-four thousand, one hundred twenty".