210003420 has 96 divisors (see below), whose sum is σ = 652458240. Its totient is φ = 50037760.

The previous prime is 210003389. The next prime is 210003427. The reversal of 210003420 is 24300012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210003396 and 210003405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210003427) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 36244 + ... + 41636.

It is an arithmetic number, because the mean of its divisors is an integer number (6796440).

Almost surely, 2^210003420 is an apocalyptic number.

210003420 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 210003420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326229120).

210003420 is an abundant number, since it is smaller than the sum of its proper divisors (442454820).

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

210003420 is a wasteful number, since it uses less digits than its factorization.

210003420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475 (or 5473 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 210003420 is about 14491.4947469197. The cubic root of 210003420 is about 594.3954219593.

Adding to 210003420 its reverse (24300012), we get a palindrome (234303432).

The spelling of 210003420 in words is "two hundred ten million, three thousand, four hundred twenty".