210020000 has 60 divisors (see below), whose sum is σ = 516729906. Its totient is φ = 84000000.

The previous prime is 210019991. The next prime is 210020003. The reversal of 210020000 is 20012.

It can be written as a sum of positive squares in 5 ways, for example, as 1936 + 210018064 = 44^2 + 14492^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is not an unprimeable number, because it can be changed into a prime (210020003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14750 + ... + 25250.

Almost surely, 2^210020000 is an apocalyptic number.

210020000 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 210020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258364953).

210020000 is an abundant number, since it is smaller than the sum of its proper divisors (306709906).

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

210020000 is an equidigital number, since it uses as much as digits as its factorization.

210020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10531 (or 10508 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 210020000 is about 14492.0667953194. The cubic root of 210020000 is about 594.4110642708.

Adding to 210020000 its reverse (20012), we get a palindrome (210040012).

The spelling of 210020000 in words is "two hundred ten million, twenty thousand".