20288907671 has 2 divisors, whose sum is σ = 20288907672. Its totient is φ = 20288907670.

The previous prime is 20288907649. The next prime is 20288907719. The reversal of 20288907671 is 17670988202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20288907671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20288907631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10144453835 + 10144453836.

It is an arithmetic number, because the mean of its divisors is an integer number (10144453836).

Almost surely, 2^20288907671 is an apocalyptic number.

20288907671 is a deficient number, since it is larger than the sum of its proper divisors (1).

20288907671 is an equidigital number, since it uses as much as digits as its factorization.

20288907671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 20288907671 in words is "twenty billion, two hundred eighty-eight million, nine hundred seven thousand, six hundred seventy-one".