20690200 has 24 divisors (see below), whose sum is σ = 48105180. Its totient is φ = 8276000.

The previous prime is 20690177. The next prime is 20690209. The reversal of 20690200 is 209602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20690209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51526 + ... + 51925.

Almost surely, 2^20690200 is an apocalyptic number.

20690200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20690200 is an abundant number, since it is smaller than the sum of its proper divisors (27414980).

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

20690200 is a wasteful number, since it uses less digits than its factorization.

20690200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103467 (or 103458 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20690200 is about 4548.6481508246. The cubic root of 20690200 is about 274.5290009317.

Adding to 20690200 its reverse (209602), we get a palindrome (20899802).

The spelling of 20690200 in words is "twenty million, six hundred ninety thousand, two hundred".