20290695 has 16 divisors (see below), whose sum is σ = 33257952. Its totient is φ = 10557440.

The previous prime is 20290693. The next prime is 20290747. The reversal of 20290695 is 59609202.

It is not a de Polignac number, because 20290695 - 2¹ = 20290693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290693) 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 15 ways as a sum of consecutive naturals, for example, 15882 + ... + 17111.

It is an arithmetic number, because the mean of its divisors is an integer number (2078622).

Almost surely, 2^20290695 is an apocalyptic number.

20290695 is a deficient number, since it is larger than the sum of its proper divisors (12967257).

20290695 is a wasteful number, since it uses less digits than its factorization.

20290695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33042.

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

The square root of 20290695 is about 4504.5193972276. The cubic root of 20290695 is about 272.7505537197.

Adding to 20290695 its reverse (59609202), we get a palindrome (79899897).

The spelling of 20290695 in words is "twenty million, two hundred ninety thousand, six hundred ninety-five".