20487359 has 2 divisors, whose sum is σ = 20487360. Its totient is φ = 20487358.

The previous prime is 20487343. The next prime is 20487361. The reversal of 20487359 is 95378402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20487359 - 2⁴ = 20487343 is a prime.

Together with 20487361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20417359) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10243679 + 10243680.

It is an arithmetic number, because the mean of its divisors is an integer number (10243680).

Almost surely, 2^20487359 is an apocalyptic number.

20487359 is a deficient number, since it is larger than the sum of its proper divisors (1).

20487359 is an equidigital number, since it uses as much as digits as its factorization.

20487359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 20487359 is about 4526.2963888813. The cubic root of 20487359 is about 273.6289176299.

The spelling of 20487359 in words is "twenty million, four hundred eighty-seven thousand, three hundred fifty-nine".