20450015550463 has 4 divisors (see below), whose sum is σ = 20575475768728. Its totient is φ = 20324555332200.

The previous prime is 20450015550457. The next prime is 20450015550521. The reversal of 20450015550463 is 36405551005402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20450015550463 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 (20450015550563) 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, 62730108888 + ... + 62730109213.

It is an arithmetic number, because the mean of its divisors is an integer number (5143868942182).

Almost surely, 2^{20450015550463} is an apocalyptic number.

20450015550463 is a deficient number, since it is larger than the sum of its proper divisors (125460218265).

20450015550463 is a wasteful number, since it uses less digits than its factorization.

20450015550463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125460218264.

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 20450015550463 its reverse (36405551005402), we get a palindrome (56855566555865).

The spelling of 20450015550463 in words is "twenty trillion, four hundred fifty billion, fifteen million, five hundred fifty thousand, four hundred sixty-three".