20328971799 has 4 divisors (see below), whose sum is σ = 27105295736. Its totient is φ = 13552647864.

The previous prime is 20328971779. The next prime is 20328971833. The reversal of 20328971799 is 99717982302.

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

It is not a de Polignac number, because 20328971799 - 2⁸ = 20328971543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20328971779) 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, 3388161964 + ... + 3388161969.

It is an arithmetic number, because the mean of its divisors is an integer number (6776323934).

Almost surely, 2^20328971799 is an apocalyptic number.

20328971799 is a deficient number, since it is larger than the sum of its proper divisors (6776323937).

20328971799 is an equidigital number, since it uses as much as digits as its factorization.

20328971799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776323936.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The spelling of 20328971799 in words is "twenty billion, three hundred twenty-eight million, nine hundred seventy-one thousand, seven hundred ninety-nine".