20179249 has 2 divisors, whose sum is σ = 20179250. Its totient is φ = 20179248.

The previous prime is 20179241. The next prime is 20179253. The reversal of 20179249 is 94297102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19963024 + 216225 = 4468^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 20179249 - 2³ = 20179241 is a prime.

It is not a weakly prime, because it can be changed into another prime (20179241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10089624 + 10089625.

It is an arithmetic number, because the mean of its divisors is an integer number (10089625).

Almost surely, 2^20179249 is an apocalyptic number.

It is an amenable number.

20179249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20179249 is an equidigital number, since it uses as much as digits as its factorization.

20179249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 20179249 is about 4492.1318992211. The cubic root of 20179249 is about 272.2502787563.

The spelling of 20179249 in words is "twenty million, one hundred seventy-nine thousand, two hundred forty-nine".