20324999 has 2 divisors, whose sum is σ = 20325000. Its totient is φ = 20324998.

The previous prime is 20324989. The next prime is 20325049. The reversal of 20324999 is 99942302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20324999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20324929) 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, 10162499 + 10162500.

It is an arithmetic number, because the mean of its divisors is an integer number (10162500).

Almost surely, 2^20324999 is an apocalyptic number.

20324999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324999 is an equidigital number, since it uses as much as digits as its factorization.

20324999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 20324999 is about 4508.3255206340. The cubic root of 20324999 is about 272.9041736785.

The spelling of 20324999 in words is "twenty million, three hundred twenty-four thousand, nine hundred ninety-nine".