209133826240 has 56 divisors (see below), whose sum is σ = 498812789520. Its totient is φ = 83516986368.

The previous prime is 209133826147. The next prime is 209133826247. The reversal of 209133826240 is 42628331902.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 209133826193 and 209133826202.

It is not an unprimeable number, because it can be changed into a prime (209133826247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336910 + ... + 729229.

Almost surely, 2^209133826240 is an apocalyptic number.

209133826240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209133826240 is an abundant number, since it is smaller than the sum of its proper divisors (289678963280).

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

209133826240 is a wasteful number, since it uses less digits than its factorization.

209133826240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066769 (or 1066759 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 209133826240 in words is "two hundred nine billion, one hundred thirty-three million, eight hundred twenty-six thousand, two hundred forty".