210020130 has 96 divisors (see below), whose sum is σ = 578223360. Its totient is φ = 52778880.

The previous prime is 210020101. The next prime is 210020137. The reversal of 210020130 is 31020012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210020137) 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 47 ways as a sum of consecutive naturals, for example, 146256 + ... + 147684.

It is an arithmetic number, because the mean of its divisors is an integer number (6023160).

Almost surely, 2^210020130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210020130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289111680).

210020130 is an abundant number, since it is smaller than the sum of its proper divisors (368203230).

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

210020130 is a wasteful number, since it uses less digits than its factorization.

210020130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 210020130 is about 14492.0712805313. The cubic root of 210020130 is about 594.4111869154.

Adding to 210020130 its reverse (31020012), we get a palindrome (241040142).

The spelling of 210020130 in words is "two hundred ten million, twenty thousand, one hundred thirty".