20860824461 has 2 divisors, whose sum is σ = 20860824462. Its totient is φ = 20860824460.

The previous prime is 20860824437. The next prime is 20860824503. The reversal of 20860824461 is 16442806802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10842015625 + 10018808836 = 104125^2 + 100094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20860824461 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20860824431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10430412230 + 10430412231.

It is an arithmetic number, because the mean of its divisors is an integer number (10430412231).

Almost surely, 2^20860824461 is an apocalyptic number.

It is an amenable number.

20860824461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20860824461 is an equidigital number, since it uses as much as digits as its factorization.

20860824461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 20860824461 in words is "twenty billion, eight hundred sixty million, eight hundred twenty-four thousand, four hundred sixty-one".