20136499 has 2 divisors, whose sum is σ = 20136500. Its totient is φ = 20136498.

The previous prime is 20136497. The next prime is 20136503. The reversal of 20136499 is 99463102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20136499 - 2¹ = 20136497 is a prime.

Together with 20136497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20136497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10068249 + 10068250.

It is an arithmetic number, because the mean of its divisors is an integer number (10068250).

Almost surely, 2^20136499 is an apocalyptic number.

20136499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20136499 is an equidigital number, since it uses as much as digits as its factorization.

20136499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 20136499 is about 4487.3710566433. The cubic root of 20136499 is about 272.0578875857.

The spelling of 20136499 in words is "twenty million, one hundred thirty-six thousand, four hundred ninety-nine".