20240073565721 has 8 divisors (see below), whose sum is σ = 20294511312864. Its totient is φ = 20185699453920.

The previous prime is 20240073565667. The next prime is 20240073565819. The reversal of 20240073565721 is 12756537004202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20240073565721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20240073565321) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15271820 + ... + 16544141.

It is an arithmetic number, because the mean of its divisors is an integer number (2536813914108).

Almost surely, 2^{20240073565721} is an apocalyptic number.

It is an amenable number.

20240073565721 is a deficient number, since it is larger than the sum of its proper divisors (54437747143).

20240073565721 is a wasteful number, since it uses less digits than its factorization.

20240073565721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31817671.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 20240073565721 in words is "twenty trillion, two hundred forty billion, seventy-three million, five hundred sixty-five thousand, seven hundred twenty-one".