209113238988 has 72 divisors (see below), whose sum is σ = 584019622368. Its totient is φ = 62751794688.

The previous prime is 209113238969. The next prime is 209113239001. The reversal of 209113238988 is 889832311902.

209113238988 is a `hidden beast` number, since 209 + 113 + 238 + 98 + 8 = 666.

209113238988 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7413931 + ... + 7442082.

It is an arithmetic number, because the mean of its divisors is an integer number (8111383644).

Almost surely, 2^209113238988 is an apocalyptic number.

It is an amenable number.

209113238988 is an abundant number, since it is smaller than the sum of its proper divisors (374906383380).

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

209113238988 is a wasteful number, since it uses less digits than its factorization.

209113238988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14856063 (or 14856058 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 209113238988 in words is "two hundred nine billion, one hundred thirteen million, two hundred thirty-eight thousand, nine hundred eighty-eight".