209020473 has 16 divisors (see below), whose sum is σ = 310186560. Its totient is φ = 139110048.

The previous prime is 209020453. The next prime is 209020517. The reversal of 209020473 is 374020902.

It is not a de Polignac number, because 209020473 - 2¹⁶ = 208954937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (209020453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10386 + ... + 22932.

It is an arithmetic number, because the mean of its divisors is an integer number (19386660).

Almost surely, 2^209020473 is an apocalyptic number.

It is an amenable number.

209020473 is a deficient number, since it is larger than the sum of its proper divisors (101166087).

209020473 is a wasteful number, since it uses less digits than its factorization.

209020473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13173 (or 13167 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 209020473 is about 14457.5403509726. The cubic root of 209020473 is about 593.4665908313.

The spelling of 209020473 in words is "two hundred nine million, twenty thousand, four hundred seventy-three".