20443002999 has 4 divisors (see below), whose sum is σ = 27257337336. Its totient is φ = 13628668664.

The previous prime is 20443002847. The next prime is 20443003019. The reversal of 20443002999 is 99920034402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20443002999 - 2¹² = 20442998903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20443002999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443002599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3407167164 + ... + 3407167169.

It is an arithmetic number, because the mean of its divisors is an integer number (6814334334).

Almost surely, 2^20443002999 is an apocalyptic number.

20443002999 is a deficient number, since it is larger than the sum of its proper divisors (6814334337).

20443002999 is an equidigital number, since it uses as much as digits as its factorization.

20443002999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814334336.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 20443002999 in words is "twenty billion, four hundred forty-three million, two thousand, nine hundred ninety-nine".