20487107 has 2 divisors, whose sum is σ = 20487108. Its totient is φ = 20487106.

The previous prime is 20487083. The next prime is 20487109. The reversal of 20487107 is 70178402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20487107 - 2¹⁰ = 20486083 is a prime.

Together with 20487109, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20487107.

It is not a weakly prime, because it can be changed into another prime (20487109) 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, 10243553 + 10243554.

It is an arithmetic number, because the mean of its divisors is an integer number (10243554).

Almost surely, 2^20487107 is an apocalyptic number.

20487107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20487107 is an equidigital number, since it uses as much as digits as its factorization.

20487107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 20487107 is about 4526.2685514671. The cubic root of 20487107 is about 273.6277957223.

The spelling of 20487107 in words is "twenty million, four hundred eighty-seven thousand, one hundred seven".