210042020 has 12 divisors (see below), whose sum is σ = 441088284. Its totient is φ = 84016800.

The previous prime is 210041989. The next prime is 210042037. The reversal of 210042020 is 20240012.

210042020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 80856064 + 129185956 = 8992^2 + 11366^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210041992 and 210042010.

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 3 ways as a sum of consecutive naturals, for example, 5251031 + ... + 5251070.

It is an arithmetic number, because the mean of its divisors is an integer number (36757357).

Almost surely, 2^210042020 is an apocalyptic number.

210042020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210042020 is an abundant number, since it is smaller than the sum of its proper divisors (231046264).

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

210042020 is a wasteful number, since it uses less digits than its factorization.

210042020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10502110 (or 10502108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 210042020 is about 14492.8265014110. The cubic root of 210042020 is about 594.4318376483.

Adding to 210042020 its reverse (20240012), we get a palindrome (230282032).

The spelling of 210042020 in words is "two hundred ten million, forty-two thousand, twenty".