209030945808 has 20 divisors (see below), whose sum is σ = 539996610128. Its totient is φ = 69676981920.

The previous prime is 209030945771. The next prime is 209030945831. The reversal of 209030945808 is 808549030902.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 4354811371 = 209030945808 / (2 + 0 + 9 + 0 + 3 + 0 + 9 + 4 + 5 + 8 + 0 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2177405638 + ... + 2177405733.

Almost surely, 2^209030945808 is an apocalyptic number.

It is an amenable number.

209030945808 is an abundant number, since it is smaller than the sum of its proper divisors (330965664320).

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

209030945808 is a wasteful number, since it uses less digits than its factorization.

209030945808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354811382 (or 4354811376 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 209030945808 in words is "two hundred nine billion, thirty million, nine hundred forty-five thousand, eight hundred eight".