20066587 has 2 divisors, whose sum is σ = 20066588. Its totient is φ = 20066586.

The previous prime is 20066581. The next prime is 20066611. The reversal of 20066587 is 78566002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20066587 is a prime.

It is equal to p_1274596 and since 20066587 and 1274596 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20066581) 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, 10033293 + 10033294.

It is an arithmetic number, because the mean of its divisors is an integer number (10033294).

Almost surely, 2^20066587 is an apocalyptic number.

20066587 is a deficient number, since it is larger than the sum of its proper divisors (1).

20066587 is an equidigital number, since it uses as much as digits as its factorization.

20066587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 20066587 is about 4479.5744217504. The cubic root of 20066587 is about 271.7426695067.

The spelling of 20066587 in words is "twenty million, sixty-six thousand, five hundred eighty-seven".