209118210004 has 48 divisors (see below), whose sum is σ = 404048062656. Its totient is φ = 93912134400.

The previous prime is 209118209987. The next prime is 209118210013. The reversal of 209118210004 is 400012811902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189702 + ... + 1354114.

It is an arithmetic number, because the mean of its divisors is an integer number (8417667972).

Almost surely, 2^209118210004 is an apocalyptic number.

It is an amenable number.

209118210004 is a deficient number, since it is larger than the sum of its proper divisors (194929852652).

209118210004 is a wasteful number, since it uses less digits than its factorization.

209118210004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164776 (or 164774 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 209118210004 in words is "two hundred nine billion, one hundred eighteen million, two hundred ten thousand, four".