11924989209 has 80 divisors (see below), whose sum is σ = 21564871680. Its totient is φ = 6415083360.

The previous prime is 11924989189. The next prime is 11924989211. The reversal of 11924989209 is 90298942911.

11924989209 is a `hidden beast` number, since 119 + 249 + 89 + 209 = 666.

It is not a de Polignac number, because 11924989209 - 2²⁴ = 11908211993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11924949209) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1752604 + ... + 1759394.

It is an arithmetic number, because the mean of its divisors is an integer number (269560896).

Almost surely, 2^11924989209 is an apocalyptic number.

11924989209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11924989209 is a deficient number, since it is larger than the sum of its proper divisors (9639882471).

11924989209 is a wasteful number, since it uses less digits than its factorization.

11924989209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992 (or 6983 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The spelling of 11924989209 in words is "eleven billion, nine hundred twenty-four million, nine hundred eighty-nine thousand, two hundred nine".