20042999 has 2 divisors, whose sum is σ = 20043000. Its totient is φ = 20042998.

The previous prime is 20042993. The next prime is 20043007. The reversal of 20042999 is 99924002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20042999 is a prime.

It is a Sophie Germain 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 (20042993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021499 + 10021500.

It is an arithmetic number, because the mean of its divisors is an integer number (10021500).

Almost surely, 2^20042999 is an apocalyptic number.

20042999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042999 is an equidigital number, since it uses as much as digits as its factorization.

20042999 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 35.

The square root of 20042999 is about 4476.9408081859. The cubic root of 20042999 is about 271.6361511552.

The spelling of 20042999 in words is "twenty million, forty-two thousand, nine hundred ninety-nine".