20857715141 has 2 divisors, whose sum is σ = 20857715142. Its totient is φ = 20857715140.

The previous prime is 20857715111. The next prime is 20857715171. The reversal of 20857715141 is 14151775802.

It is a balanced prime because it is at equal distance from previous prime (20857715111) and next prime (20857715171).

It can be written as a sum of positive squares in only one way, i.e., 14751074116 + 6106641025 = 121454^2 + 78145^2 .

It is a cyclic number.

It is not a de Polignac number, because 20857715141 - 2⁶ = 20857715077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20857715111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10428857570 + 10428857571.

It is an arithmetic number, because the mean of its divisors is an integer number (10428857571).

Almost surely, 2^20857715141 is an apocalyptic number.

It is an amenable number.

20857715141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20857715141 is an equidigital number, since it uses as much as digits as its factorization.

20857715141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78400, while the sum is 41.

The spelling of 20857715141 in words is "twenty billion, eight hundred fifty-seven million, seven hundred fifteen thousand, one hundred forty-one".