200019640 has 16 divisors (see below), whose sum is σ = 450044280. Its totient is φ = 80007840.

The previous prime is 200019623. The next prime is 200019649. The reversal of 200019640 is 46910002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200019649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500206 + ... + 2500285.

Almost surely, 2^200019640 is an apocalyptic number.

200019640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200019640 is an abundant number, since it is smaller than the sum of its proper divisors (250024640).

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

200019640 is a wasteful number, since it uses less digits than its factorization.

200019640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000502 (or 5000498 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 200019640 is about 14142.8299855439. The cubic root of 200019640 is about 584.8226895855.

Adding to 200019640 its reverse (46910002), we get a palindrome (246929642).

The spelling of 200019640 in words is "two hundred million, nineteen thousand, six hundred forty".