20065416064321 has 2 divisors, whose sum is σ = 20065416064322. Its totient is φ = 20065416064320.

The previous prime is 20065416064261. The next prime is 20065416064327. The reversal of 20065416064321 is 12346061456002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19299230961921 + 766185102400 = 4393089^2 + 875320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20065416064321 is a prime.

It is a super-2 number, since 2×20065416064321² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20065416064327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10032708032160 + 10032708032161.

It is an arithmetic number, because the mean of its divisors is an integer number (10032708032161).

Almost surely, 2^{20065416064321} is an apocalyptic number.

It is an amenable number.

20065416064321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20065416064321 is an equidigital number, since it uses as much as digits as its factorization.

20065416064321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 20065416064321 in words is "twenty trillion, sixty-five billion, four hundred sixteen million, sixty-four thousand, three hundred twenty-one".