2164020 has 24 divisors (see below), whose sum is σ = 6059424. Its totient is φ = 577056.

The previous prime is 2164013. The next prime is 2164031. The reversal of 2164020 is 204612.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17974 + ... + 18093.

It is an arithmetic number, because the mean of its divisors is an integer number (252476).

2^2164020 is an apocalyptic number.

2164020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164020 is an abundant number, since it is smaller than the sum of its proper divisors (3895404).

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

2164020 is a wasteful number, since it uses less digits than its factorization.

2164020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36079 (or 36077 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2164020 is about 1471.0608417057. The cubic root of 2164020 is about 129.3462245508.

Adding to 2164020 its reverse (204612), we get a palindrome (2368632).

The spelling of 2164020 in words is "two million, one hundred sixty-four thousand, twenty".