20431105510045 has 8 divisors (see below), whose sum is σ = 25959522295224. Its totient is φ = 15383420619264.

The previous prime is 20431105510043. The next prime is 20431105510069. The reversal of 20431105510045 is 54001550113402.

It can be written as a sum of positive squares in 4 ways, for example, as 8468437563364 + 11962667946681 = 2910058^2 + 3458709^2 .

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 20431105510045 - 2¹ = 20431105510043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20431105509989 and 20431105510016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431105510043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120182973504 + ... + 120182973673.

It is an arithmetic number, because the mean of its divisors is an integer number (3244940286903).

Almost surely, 2^{20431105510045} is an apocalyptic number.

It is an amenable number.

20431105510045 is a deficient number, since it is larger than the sum of its proper divisors (5528416785179).

20431105510045 is a wasteful number, since it uses less digits than its factorization.

20431105510045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240365947199.

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

Adding to 20431105510045 its reverse (54001550113402), we get a palindrome (74432655623447).

The spelling of 20431105510045 in words is "twenty trillion, four hundred thirty-one billion, one hundred five million, five hundred ten thousand, forty-five".