20290099 has 2 divisors, whose sum is σ = 20290100. Its totient is φ = 20290098.

The previous prime is 20290093. The next prime is 20290133. The reversal of 20290099 is 99009202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20290099 - 2³ = 20290091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20290099.

It is not a weakly prime, because it can be changed into another prime (20290091) 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 as a sum of consecutive naturals, namely, 10145049 + 10145050.

It is an arithmetic number, because the mean of its divisors is an integer number (10145050).

Almost surely, 2^20290099 is an apocalyptic number.

20290099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20290099 is an equidigital number, since it uses as much as digits as its factorization.

20290099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 20290099 is about 4504.4532409605. The cubic root of 20290099 is about 272.7478831865.

The spelling of 20290099 in words is "twenty million, two hundred ninety thousand, ninety-nine".