209020456 has 16 divisors (see below), whose sum is σ = 394907040. Its totient is φ = 103711920.

The previous prime is 209020453. The next prime is 209020517. The reversal of 209020456 is 654020902.

It is not an unprimeable number, because it can be changed into a prime (209020453) 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 3 ways as a sum of consecutive naturals, for example, 98676 + ... + 100771.

It is an arithmetic number, because the mean of its divisors is an integer number (24681690).

Almost surely, 2^209020456 is an apocalyptic number.

It is an amenable number.

209020456 is a deficient number, since it is larger than the sum of its proper divisors (185886584).

209020456 is a wasteful number, since it uses less digits than its factorization.

209020456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199584 (or 199580 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 209020456 is about 14457.5397630441. The cubic root of 209020456 is about 593.4665747420.

The spelling of 209020456 in words is "two hundred nine million, twenty thousand, four hundred fifty-six".