2120020 has 48 divisors (see below), whose sum is σ = 5362560. Its totient is φ = 687744.

The previous prime is 2120017. The next prime is 2120021. The reversal of 2120020 is 200212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2119985 and 2120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2262 + ... + 3058.

It is an arithmetic number, because the mean of its divisors is an integer number (111720).

2^2120020 is an apocalyptic number.

2120020 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 2120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2681280).

2120020 is an abundant number, since it is smaller than the sum of its proper divisors (3242540).

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

2120020 is a wasteful number, since it uses less digits than its factorization.

2120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832 (or 830 counting only the distinct ones).

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

The square root of 2120020 is about 1456.0288458681. The cubic root of 2120020 is about 128.4635697422.

Adding to 2120020 its reverse (200212), we get a palindrome (2320232).

The spelling of 2120020 in words is "two million, one hundred twenty thousand, twenty".