20345327999 has 4 divisors (see below), whose sum is σ = 20573927280. Its totient is φ = 20116728720.

The previous prime is 20345327917. The next prime is 20345328007. The reversal of 20345327999 is 99972354302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20345327999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20345327999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345327399) 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, 114299507 + ... + 114299684.

It is an arithmetic number, because the mean of its divisors is an integer number (5143481820).

Almost surely, 2^20345327999 is an apocalyptic number.

20345327999 is a deficient number, since it is larger than the sum of its proper divisors (228599281).

20345327999 is an equidigital number, since it uses as much as digits as its factorization.

20345327999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228599280.

The product of its (nonzero) digits is 3674160, while the sum is 53.

The spelling of 20345327999 in words is "twenty billion, three hundred forty-five million, three hundred twenty-seven thousand, nine hundred ninety-nine".