20302271999 has 4 divisors (see below), whose sum is σ = 20302992336. Its totient is φ = 20301551664.

The previous prime is 20302271993. The next prime is 20302272007. The reversal of 20302271999 is 99917220302.

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 20302271999 - 2¹² = 20302267903 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 (20302271993) 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, 316094 + ... + 374859.

It is an arithmetic number, because the mean of its divisors is an integer number (5075748084).

Almost surely, 2^20302271999 is an apocalyptic number.

20302271999 is a deficient number, since it is larger than the sum of its proper divisors (720337).

20302271999 is an equidigital number, since it uses as much as digits as its factorization.

20302271999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720336.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 20302271999 in words is "twenty billion, three hundred two million, two hundred seventy-one thousand, nine hundred ninety-nine".