20898167 has 2 divisors, whose sum is σ = 20898168. Its totient is φ = 20898166.

The previous prime is 20898161. The next prime is 20898169. The reversal of 20898167 is 76189802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20898167 - 2¹⁰ = 20897143 is a prime.

Together with 20898169, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20898161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10449083 + 10449084.

It is an arithmetic number, because the mean of its divisors is an integer number (10449084).

Almost surely, 2^20898167 is an apocalyptic number.

20898167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20898167 is an equidigital number, since it uses as much as digits as its factorization.

20898167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 20898167 is about 4571.4513012828. The cubic root of 20898167 is about 275.4457432271.

The spelling of 20898167 in words is "twenty million, eight hundred ninety-eight thousand, one hundred sixty-seven".