20310121550245 has 8 divisors (see below), whose sum is σ = 24372221702040. Its totient is φ = 16248046679040.

The previous prime is 20310121550227. The next prime is 20310121550261. The reversal of 20310121550245 is 54205512101302.

It can be written as a sum of positive squares in 4 ways, for example, as 1197783591489 + 19112337958756 = 1094433^2 + 4371766^2 .

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

It is not a de Polignac number, because 20310121550245 - 2³⁹ = 19760365736357 is a prime.

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, 4505316 + ... + 7805005.

It is an arithmetic number, because the mean of its divisors is an integer number (3046527712755).

Almost surely, 2^{20310121550245} is an apocalyptic number.

It is an amenable number.

20310121550245 is a deficient number, since it is larger than the sum of its proper divisors (4062100151795).

20310121550245 is a wasteful number, since it uses less digits than its factorization.

20310121550245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12640295.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 20310121550245 its reverse (54205512101302), we get a palindrome (74515633651547).

The spelling of 20310121550245 in words is "twenty trillion, three hundred ten billion, one hundred twenty-one million, five hundred fifty thousand, two hundred forty-five".