20302455205 has 8 divisors (see below), whose sum is σ = 24363774072. Its totient is φ = 16241412288.

The previous prime is 20302455163. The next prime is 20302455223. The reversal of 20302455205 is 50255420302.

It can be written as a sum of positive squares in 4 ways, for example, as 4695949729 + 15606505476 = 68527^2 + 124926^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20302455205 - 2³¹ = 18154971557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165079 + ... + 260491.

It is an arithmetic number, because the mean of its divisors is an integer number (3045471759).

Almost surely, 2^20302455205 is an apocalyptic number.

It is an amenable number.

20302455205 is a deficient number, since it is larger than the sum of its proper divisors (4061318867).

20302455205 is an equidigital number, since it uses as much as digits as its factorization.

20302455205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137975.

The product of its (nonzero) digits is 12000, while the sum is 28.

Adding to 20302455205 its reverse (50255420302), we get a palindrome (70557875507).

The spelling of 20302455205 in words is "twenty billion, three hundred two million, four hundred fifty-five thousand, two hundred five".