20690295 has 8 divisors (see below), whose sum is σ = 33104496. Its totient is φ = 11034816.

The previous prime is 20690279. The next prime is 20690303. The reversal of 20690295 is 59209602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20690295 - 2⁴ = 20690279 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689662 + ... + 689691.

It is an arithmetic number, because the mean of its divisors is an integer number (4138062).

Almost surely, 2^20690295 is an apocalyptic number.

20690295 is a deficient number, since it is larger than the sum of its proper divisors (12414201).

20690295 is a wasteful number, since it uses less digits than its factorization.

20690295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379361.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 20690295 is about 4548.6585934757. The cubic root of 20690295 is about 274.5294211019.

Adding to 20690295 its reverse (59209602), we get a palindrome (79899897).

The spelling of 20690295 in words is "twenty million, six hundred ninety thousand, two hundred ninety-five".