20305004453121 has 64 divisors (see below), whose sum is σ = 29250105016320. Its totient is φ = 12504887619840.

The previous prime is 20305004453117. The next prime is 20305004453159. The reversal of 20305004453121 is 12135440050302.

It is not a de Polignac number, because 20305004453121 - 2² = 20305004453117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20305004457121) 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, 40407216 + ... + 40906638.

It is an arithmetic number, because the mean of its divisors is an integer number (457032890880).

Almost surely, 2^{20305004453121} is an apocalyptic number.

It is an amenable number.

20305004453121 is a deficient number, since it is larger than the sum of its proper divisors (8945100563199).

20305004453121 is a wasteful number, since it uses less digits than its factorization.

20305004453121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499726.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 20305004453121 in words is "twenty trillion, three hundred five billion, four million, four hundred fifty-three thousand, one hundred twenty-one".