20355000217745 has 96 divisors (see below), whose sum is σ = 26778217939200. Its totient is φ = 14841300418560.

The previous prime is 20355000217729. The next prime is 20355000217763. The reversal of 20355000217745 is 54771200055302.

It is not a de Polignac number, because 20355000217745 - 2⁴ = 20355000217729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5505813737 + ... + 5505817433.

It is an arithmetic number, because the mean of its divisors is an integer number (278939770200).

Almost surely, 2^{20355000217745} is an apocalyptic number.

It is an amenable number.

20355000217745 is a deficient number, since it is larger than the sum of its proper divisors (6423217721455).

20355000217745 is a wasteful number, since it uses less digits than its factorization.

20355000217745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443 (or 4426 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 41.

The spelling of 20355000217745 in words is "twenty trillion, three hundred fifty-five billion, two hundred seventeen thousand, seven hundred forty-five".