20434821368577 has 64 divisors (see below), whose sum is σ = 34897596125184. Its totient is φ = 10325647722240.

The previous prime is 20434821368477. The next prime is 20434821368581. The reversal of 20434821368577 is 77586312843402.

It is not a de Polignac number, because 20434821368577 - 2⁸ = 20434821368321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20434821368577.

It is not an unprimeable number, because it can be changed into a prime (20434821368587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29858188 + ... + 30534914.

It is an arithmetic number, because the mean of its divisors is an integer number (545274939456).

Almost surely, 2^{20434821368577} is an apocalyptic number.

It is an amenable number.

20434821368577 is a deficient number, since it is larger than the sum of its proper divisors (14462774756607).

20434821368577 is a wasteful number, since it uses less digits than its factorization.

20434821368577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680318.

The product of its (nonzero) digits is 54190080, while the sum is 60.

The spelling of 20434821368577 in words is "twenty trillion, four hundred thirty-four billion, eight hundred twenty-one million, three hundred sixty-eight thousand, five hundred seventy-seven".