20258867 has 2 divisors, whose sum is σ = 20258868. Its totient is φ = 20258866.

The previous prime is 20258863. The next prime is 20258873. The reversal of 20258867 is 76885202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20258867 - 2² = 20258863 is a prime.

It is a Chen prime.

It is equal to p_1285976 and since 20258867 and 1285976 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20258867.

It is not a weakly prime, because it can be changed into another prime (20258863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10129433 + 10129434.

It is an arithmetic number, because the mean of its divisors is an integer number (10129434).

Almost surely, 2^20258867 is an apocalyptic number.

20258867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20258867 is an equidigital number, since it uses as much as digits as its factorization.

20258867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 20258867 is about 4500.9851143944. The cubic root of 20258867 is about 272.6078668436.

The spelling of 20258867 in words is "twenty million, two hundred fifty-eight thousand, eight hundred sixty-seven".