209647053830 has 16 divisors (see below), whose sum is σ = 387563743440. Its totient is φ = 81592366752.

The previous prime is 209647053827. The next prime is 209647053853. The reversal of 209647053830 is 38350746902.

It is a happy number.

209647053830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283306460 + ... + 283307199.

It is an arithmetic number, because the mean of its divisors is an integer number (24222733965).

Almost surely, 2^209647053830 is an apocalyptic number.

209647053830 is a deficient number, since it is larger than the sum of its proper divisors (177916689610).

209647053830 is a wasteful number, since it uses less digits than its factorization.

209647053830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566613703.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 209647053830 in words is "two hundred nine billion, six hundred forty-seven million, fifty-three thousand, eight hundred thirty".