20763541871 has 2 divisors, whose sum is σ = 20763541872. Its totient is φ = 20763541870.

The previous prime is 20763541853. The next prime is 20763541907. The reversal of 20763541871 is 17814536702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20763541871 is a prime.

It is a super-2 number, since 2×20763541871² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20763541811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10381770935 + 10381770936.

It is an arithmetic number, because the mean of its divisors is an integer number (10381770936).

Almost surely, 2^20763541871 is an apocalyptic number.

20763541871 is a deficient number, since it is larger than the sum of its proper divisors (1).

20763541871 is an equidigital number, since it uses as much as digits as its factorization.

20763541871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 20763541871 in words is "twenty billion, seven hundred sixty-three million, five hundred forty-one thousand, eight hundred seventy-one".