20290051 has 2 divisors, whose sum is σ = 20290052. Its totient is φ = 20290050.

The previous prime is 20290037. The next prime is 20290091. The reversal of 20290051 is 15009202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20290051 - 2¹¹ = 20288003 is a prime.

It is not a weakly prime, because it can be changed into another prime (20290001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10145025 + 10145026.

It is an arithmetic number, because the mean of its divisors is an integer number (10145026).

Almost surely, 2^20290051 is an apocalyptic number.

20290051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20290051 is an equidigital number, since it uses as much as digits as its factorization.

20290051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20290051 is about 4504.4479128968. The cubic root of 20290051 is about 272.7476681077.

Adding to 20290051 its reverse (15009202), we get a palindrome (35299253).

The spelling of 20290051 in words is "twenty million, two hundred ninety thousand, fifty-one".