20030587 has 2 divisors, whose sum is σ = 20030588. Its totient is φ = 20030586.

The previous prime is 20030551. The next prime is 20030599. The reversal of 20030587 is 78503002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20030587 is a prime.

It is not a weakly prime, because it can be changed into another prime (20030287) 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, 10015293 + 10015294.

It is an arithmetic number, because the mean of its divisors is an integer number (10015294).

Almost surely, 2^20030587 is an apocalyptic number.

20030587 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030587 is an equidigital number, since it uses as much as digits as its factorization.

20030587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20030587 is about 4475.5543790686. The cubic root of 20030587 is about 271.5800676634.

Adding to 20030587 its reverse (78503002), we get a palindrome (98533589).

The spelling of 20030587 in words is "twenty million, thirty thousand, five hundred eighty-seven".