209045020 has 12 divisors (see below), whose sum is σ = 438994584. Its totient is φ = 83618000.

The previous prime is 209045017. The next prime is 209045027. The reversal of 209045020 is 20540902.

It is a happy number.

209045020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 209044982 and 209045000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209045027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5226106 + ... + 5226145.

It is an arithmetic number, because the mean of its divisors is an integer number (36582882).

Almost surely, 2^209045020 is an apocalyptic number.

209045020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209045020 is an abundant number, since it is smaller than the sum of its proper divisors (229949564).

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

209045020 is a wasteful number, since it uses less digits than its factorization.

209045020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10452260 (or 10452258 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 209045020 is about 14458.3892602184. The cubic root of 209045020 is about 593.4898218159.

Adding to 209045020 its reverse (20540902), we get a palindrome (229585922).

The spelling of 209045020 in words is "two hundred nine million, forty-five thousand, twenty".