20690229 has 16 divisors (see below), whose sum is σ = 31692800. Its totient is φ = 11761200.

The previous prime is 20690227. The next prime is 20690231. The reversal of 20690229 is 92209602.

It is an interprime number because it is at equal distance from previous prime (20690227) and next prime (20690231).

It is not a de Polignac number, because 20690229 - 2¹ = 20690227 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20690196 and 20690205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20690227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1704 + ... + 6654.

It is an arithmetic number, because the mean of its divisors is an integer number (1980800).

Almost surely, 2^20690229 is an apocalyptic number.

It is an amenable number.

20690229 is a deficient number, since it is larger than the sum of its proper divisors (11002571).

20690229 is a wasteful number, since it uses less digits than its factorization.

20690229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20690229 is about 4548.6513385838. The cubic root of 20690229 is about 274.5291291943.

The spelling of 20690229 in words is "twenty million, six hundred ninety thousand, two hundred twenty-nine".