20690150 has 48 divisors (see below), whose sum is σ = 41924400. Its totient is φ = 7551360.

The previous prime is 20690149. The next prime is 20690161. The reversal of 20690150 is 5109602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90236 + ... + 90464.

It is an arithmetic number, because the mean of its divisors is an integer number (873425).

Almost surely, 2^20690150 is an apocalyptic number.

20690150 is an abundant number, since it is smaller than the sum of its proper divisors (21234250).

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

20690150 is a wasteful number, since it uses less digits than its factorization.

20690150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20690150 is about 4548.6426546828. The cubic root of 20690150 is about 274.5287797890.

Adding to 20690150 its reverse (5109602), we get a palindrome (25799752).

The spelling of 20690150 in words is "twenty million, six hundred ninety thousand, one hundred fifty".