20450005121115 has 24 divisors (see below), whose sum is σ = 35446828004640. Its totient is φ = 10906622486784.

The previous prime is 20450005121113. The next prime is 20450005121123. The reversal of 20450005121115 is 51112150005402.

It is a happy number.

20450005121115 is a `hidden beast` number, since 20 + 4 + 500 + 0 + 5 + 1 + 21 + 115 = 666.

It is not a de Polignac number, because 20450005121115 - 2¹ = 20450005121113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20450005121113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11294626 + ... + 12979544.

It is an arithmetic number, because the mean of its divisors is an integer number (1476951166860).

Almost surely, 2^{20450005121115} is an apocalyptic number.

20450005121115 is a deficient number, since it is larger than the sum of its proper divisors (14996822883525).

20450005121115 is a wasteful number, since it uses less digits than its factorization.

20450005121115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954643 (or 1954640 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 20450005121115 its reverse (51112150005402), we get a palindrome (71562155126517).

The spelling of 20450005121115 in words is "twenty trillion, four hundred fifty billion, five million, one hundred twenty-one thousand, one hundred fifteen".