9418120209 has 45 divisors (see below), whose sum is σ = 14475600139. Its totient is φ = 6102315360.

The previous prime is 9418120189. The next prime is 9418120219. The reversal of 9418120209 is 9020218149.

The square root of 9418120209 is 97047.

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

It can be written as a sum of positive squares in only one way, i.e., 453817809 + 8964302400 = 21303^2 + 94680^2 .

It is not a de Polignac number, because 9418120209 - 2¹¹ = 9418118161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9418120219) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 35810212 + ... + 35810474.

Almost surely, 2^9418120209 is an apocalyptic number.

9418120209 is the 97047-th square number.

9418120209 is the 48524-th centered octagonal number.

It is an amenable number.

9418120209 is a deficient number, since it is larger than the sum of its proper divisors (5057479930).

9418120209 is an frugal number, since it uses more digits than its factorization.

9418120209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The cubic root of 9418120209 is about 2111.8095188328.

Multiplying 9418120209 by its sum of digits (36), we get a square (339052327524 = 582282²).

The spelling of 9418120209 in words is "nine billion, four hundred eighteen million, one hundred twenty thousand, two hundred nine".