20515303450455 has 64 divisors (see below), whose sum is σ = 35895355255296. Its totient is φ = 9922705920000.

The previous prime is 20515303450429. The next prime is 20515303450459. The reversal of 20515303450455 is 55405430351502.

It is not a de Polignac number, because 20515303450455 - 2⁸ = 20515303450199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20515303450459) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 343892380 + ... + 343952030.

It is an arithmetic number, because the mean of its divisors is an integer number (560864925864).

Almost surely, 2^{20515303450455} is an apocalyptic number.

20515303450455 is a deficient number, since it is larger than the sum of its proper divisors (15380051804841).

20515303450455 is a wasteful number, since it uses less digits than its factorization.

20515303450455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64688.

The product of its (nonzero) digits is 900000, while the sum is 42.

The spelling of 20515303450455 in words is "twenty trillion, five hundred fifteen billion, three hundred three million, four hundred fifty thousand, four hundred fifty-five".