20106187 has 2 divisors, whose sum is σ = 20106188. Its totient is φ = 20106186.

The previous prime is 20106173. The next prime is 20106217. The reversal of 20106187 is 78160102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20106187 - 2¹⁵ = 20073419 is a prime.

It is not a weakly prime, because it can be changed into another prime (20106127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10053093 + 10053094.

It is an arithmetic number, because the mean of its divisors is an integer number (10053094).

Almost surely, 2^20106187 is an apocalyptic number.

20106187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20106187 is an equidigital number, since it uses as much as digits as its factorization.

20106187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 20106187 is about 4483.9923059702. The cubic root of 20106187 is about 271.9213070725.

Adding to 20106187 its reverse (78160102), we get a palindrome (98266289).

The spelling of 20106187 in words is "twenty million, one hundred six thousand, one hundred eighty-seven".