209524832412 has 72 divisors (see below), whose sum is σ = 568842591744. Its totient is φ = 59850308448.

The previous prime is 209524832411. The next prime is 209524832423. The reversal of 209524832412 is 214238425902.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209524832411) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2634453 + ... + 2712819.

It is an arithmetic number, because the mean of its divisors is an integer number (7900591552).

Almost surely, 2^209524832412 is an apocalyptic number.

It is an amenable number.

209524832412 is an abundant number, since it is smaller than the sum of its proper divisors (359317759332).

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

209524832412 is a wasteful number, since it uses less digits than its factorization.

209524832412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82935 (or 82926 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 209524832412 in words is "two hundred nine billion, five hundred twenty-four million, eight hundred thirty-two thousand, four hundred twelve".