20451002303065 has 16 divisors (see below), whose sum is σ = 24685614181008. Its totient is φ = 16264807842816.

The previous prime is 20451002303063. The next prime is 20451002303191. The reversal of 20451002303065 is 56030320015402.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3672450980496 + 16778551322569 = 1916364^2 + 4096163^2 .

It is a cyclic number.

It is not a de Polignac number, because 20451002303065 - 2¹ = 20451002303063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20451002303063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16933324 + ... + 18100813.

It is an arithmetic number, because the mean of its divisors is an integer number (1542850886313).

Almost surely, 2^{20451002303065} is an apocalyptic number.

It is an amenable number.

20451002303065 is a deficient number, since it is larger than the sum of its proper divisors (4234611877943).

20451002303065 is a wasteful number, since it uses less digits than its factorization.

20451002303065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35034828.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 20451002303065 its reverse (56030320015402), we get a palindrome (76481322318467).

The spelling of 20451002303065 in words is "twenty trillion, four hundred fifty-one billion, two million, three hundred three thousand, sixty-five".