20290559 has 2 divisors, whose sum is σ = 20290560. Its totient is φ = 20290558.

The previous prime is 20290553. The next prime is 20290579. The reversal of 20290559 is 95509202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20290559 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20290553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10145279 + 10145280.

It is an arithmetic number, because the mean of its divisors is an integer number (10145280).

Almost surely, 2^20290559 is an apocalyptic number.

20290559 is a deficient number, since it is larger than the sum of its proper divisors (1).

20290559 is an equidigital number, since it uses as much as digits as its factorization.

20290559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 20290559 is about 4504.5043012522. The cubic root of 20290559 is about 272.7499443409.

The spelling of 20290559 in words is "twenty million, two hundred ninety thousand, five hundred fifty-nine".