20108867 has 2 divisors, whose sum is σ = 20108868. Its totient is φ = 20108866.

The previous prime is 20108857. The next prime is 20108873. The reversal of 20108867 is 76880102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20108867 - 2²⁴ = 3331651 is a prime.

It is not a weakly prime, because it can be changed into another prime (20108857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054433 + 10054434.

It is an arithmetic number, because the mean of its divisors is an integer number (10054434).

Almost surely, 2^20108867 is an apocalyptic number.

20108867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20108867 is an equidigital number, since it uses as much as digits as its factorization.

20108867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 20108867 is about 4484.2911368465. The cubic root of 20108867 is about 271.9333882082.

Adding to 20108867 its reverse (76880102), we get a palindrome (96988969).

The spelling of 20108867 in words is "twenty million, one hundred eight thousand, eight hundred sixty-seven".