20295689 has 2 divisors, whose sum is σ = 20295690. Its totient is φ = 20295688.

The previous prime is 20295673. The next prime is 20295701. The reversal of 20295689 is 98659202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16810000 + 3485689 = 4100^2 + 1867^2 .

It is a cyclic number.

It is not a de Polignac number, because 20295689 - 2⁴ = 20295673 is a prime.

It is not a weakly prime, because it can be changed into another prime (20295589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10147844 + 10147845.

It is an arithmetic number, because the mean of its divisors is an integer number (10147845).

Almost surely, 2^20295689 is an apocalyptic number.

It is an amenable number.

20295689 is a deficient number, since it is larger than the sum of its proper divisors (1).

20295689 is an equidigital number, since it uses as much as digits as its factorization.

20295689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 20295689 is about 4505.0736952907. The cubic root of 20295689 is about 272.7729285822.

The spelling of 20295689 in words is "twenty million, two hundred ninety-five thousand, six hundred eighty-nine".