20137258249 has 2 divisors, whose sum is σ = 20137258250. Its totient is φ = 20137258248.

The previous prime is 20137258223. The next prime is 20137258277. The reversal of 20137258249 is 94285273102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16739184400 + 3398073849 = 129380^2 + 58293^2 .

It is a cyclic number.

It is not a de Polignac number, because 20137258249 - 2¹¹ = 20137256201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20137258289) 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, 10068629124 + 10068629125.

It is an arithmetic number, because the mean of its divisors is an integer number (10068629125).

Almost surely, 2^20137258249 is an apocalyptic number.

It is an amenable number.

20137258249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20137258249 is an equidigital number, since it uses as much as digits as its factorization.

20137258249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 20137258249 in words is "twenty billion, one hundred thirty-seven million, two hundred fifty-eight thousand, two hundred forty-nine".