20030987 has 2 divisors, whose sum is σ = 20030988. Its totient is φ = 20030986.

The previous prime is 20030957. The next prime is 20031029. The reversal of 20030987 is 78903002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20030987 - 2¹⁸ = 19768843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20030957) 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, 10015493 + 10015494.

It is an arithmetic number, because the mean of its divisors is an integer number (10015494).

Almost surely, 2^20030987 is an apocalyptic number.

20030987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030987 is an equidigital number, since it uses as much as digits as its factorization.

20030987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20030987 is about 4475.5990660469. The cubic root of 20030987 is about 271.5818754204.

Adding to 20030987 its reverse (78903002), we get a palindrome (98933989).

The spelling of 20030987 in words is "twenty million, thirty thousand, nine hundred eighty-seven".