209030011204 has 135 divisors (see below), whose sum is σ = 456156870897. Its totient is φ = 83568479232.

The previous prime is 209030011159. The next prime is 209030011219. The reversal of 209030011204 is 402110030902.

The square root of 209030011204 is 457198.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 117313100100 + 91716911104 = 342510^2 + 302848^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1849823052 + ... + 1849823164.

Almost surely, 2^209030011204 is an apocalyptic number.

209030011204 is the 457198-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209030011204

209030011204 is an abundant number, since it is smaller than the sum of its proper divisors (247126859693).

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

209030011204 is an frugal number, since it uses more digits than its factorization.

209030011204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 209030011204 in words is "two hundred nine billion, thirty million, eleven thousand, two hundred four".