209202012 has 54 divisors (see below), whose sum is σ = 546515424. Its totient is φ = 67473360.

The previous prime is 209201987. The next prime is 209202031. The reversal of 209202012 is 210202902.

209202012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×209202012⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31573 + ... + 37619.

It is an arithmetic number, because the mean of its divisors is an integer number (10120656).

Almost surely, 2^209202012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209202012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273257712).

209202012 is an abundant number, since it is smaller than the sum of its proper divisors (337313412).

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

209202012 is a wasteful number, since it uses less digits than its factorization.

209202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6119 (or 6083 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 209202012 is about 14463.8173384484. The cubic root of 209202012 is about 593.6383541585.

Adding to 209202012 its reverse (210202902), we get a palindrome (419404914).

The spelling of 209202012 in words is "two hundred nine million, two hundred two thousand, twelve".