20217244861573 has 16 divisors (see below), whose sum is σ = 21668713666560. Its totient is φ = 18820711324800.

The previous prime is 20217244861559. The next prime is 20217244861591. The reversal of 20217244861573 is 37516844271202.

It is a cyclic number.

It is not a de Polignac number, because 20217244861573 - 2⁹ = 20217244861061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20217244861573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20217244864573) 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 15 ways as a sum of consecutive naturals, for example, 41248240 + ... + 41735497.

It is an arithmetic number, because the mean of its divisors is an integer number (1354294604160).

Almost surely, 2^{20217244861573} is an apocalyptic number.

It is an amenable number.

20217244861573 is a deficient number, since it is larger than the sum of its proper divisors (1451468804987).

20217244861573 is a wasteful number, since it uses less digits than its factorization.

20217244861573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82984068.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 20217244861573 in words is "twenty trillion, two hundred seventeen billion, two hundred forty-four million, eight hundred sixty-one thousand, five hundred seventy-three".