20860730321 has 2 divisors, whose sum is σ = 20860730322. Its totient is φ = 20860730320.

The previous prime is 20860730291. The next prime is 20860730353. The reversal of 20860730321 is 12303706802.

It is a happy number.

It is an a-pointer prime, because the next prime (20860730353) can be obtained adding 20860730321 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19164526096 + 1696204225 = 138436^2 + 41185^2 .

It is a cyclic number.

It is not a de Polignac number, because 20860730321 - 2³⁴ = 3680861137 is a prime.

It is not a weakly prime, because it can be changed into another prime (20860730221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10430365160 + 10430365161.

It is an arithmetic number, because the mean of its divisors is an integer number (10430365161).

Almost surely, 2^20860730321 is an apocalyptic number.

It is an amenable number.

20860730321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20860730321 is an equidigital number, since it uses as much as digits as its factorization.

20860730321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 20860730321 in words is "twenty billion, eight hundred sixty million, seven hundred thirty thousand, three hundred twenty-one".