20860000961 has 2 divisors, whose sum is σ = 20860000962. Its totient is φ = 20860000960.

The previous prime is 20860000897. The next prime is 20860001039. The reversal of 20860000961 is 16900006802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16418578225 + 4441422736 = 128135^2 + 66644^2 .

It is a cyclic number.

It is not a de Polignac number, because 20860000961 - 2⁶ = 20860000897 is a prime.

It is not a weakly prime, because it can be changed into another prime (20860000261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10430000480 + 10430000481.

It is an arithmetic number, because the mean of its divisors is an integer number (10430000481).

Almost surely, 2^20860000961 is an apocalyptic number.

It is an amenable number.

20860000961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20860000961 is an equidigital number, since it uses as much as digits as its factorization.

20860000961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 20860000961 in words is "twenty billion, eight hundred sixty million, nine hundred sixty-one", and thus it is an aban number.