20814080190721 has 8 divisors (see below), whose sum is σ = 21043373163264. Its totient is φ = 20585908455840.

The previous prime is 20814080190707. The next prime is 20814080190731. The reversal of 20814080190721 is 12709108041802.

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

It is a cyclic number.

It is not a de Polignac number, because 20814080190721 - 2¹⁹ = 20814079666433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20814080190731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280272085 + ... + 280346338.

It is an arithmetic number, because the mean of its divisors is an integer number (2630421645408).

Almost surely, 2^{20814080190721} is an apocalyptic number.

It is an amenable number.

20814080190721 is a deficient number, since it is larger than the sum of its proper divisors (229292972543).

20814080190721 is a wasteful number, since it uses less digits than its factorization.

20814080190721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560618831.

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 20814080190721 in words is "twenty trillion, eight hundred fourteen billion, eighty million, one hundred ninety thousand, seven hundred twenty-one".