20008249 has 2 divisors, whose sum is σ = 20008250. Its totient is φ = 20008248.

The previous prime is 20008243. The next prime is 20008253. The reversal of 20008249 is 94280002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19316025 + 692224 = 4395^2 + 832^2 .

It is a cyclic number.

It is not a de Polignac number, because 20008249 - 2⁵ = 20008217 is a prime.

It is not a weakly prime, because it can be changed into another prime (20008243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004124 + 10004125.

It is an arithmetic number, because the mean of its divisors is an integer number (10004125).

Almost surely, 2^20008249 is an apocalyptic number.

It is an amenable number.

20008249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20008249 is an equidigital number, since it uses as much as digits as its factorization.

20008249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20008249 is about 4473.0581261593. The cubic root of 20008249 is about 271.4790752482.

The spelling of 20008249 in words is "twenty million, eight thousand, two hundred forty-nine".