20206067591 has 2 divisors, whose sum is σ = 20206067592. Its totient is φ = 20206067590.

The previous prime is 20206067569. The next prime is 20206067647. The reversal of 20206067591 is 19576060202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20206067591 - 2⁶ = 20206067527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20206067501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103033795 + 10103033796.

It is an arithmetic number, because the mean of its divisors is an integer number (10103033796).

Almost surely, 2^20206067591 is an apocalyptic number.

20206067591 is a deficient number, since it is larger than the sum of its proper divisors (1).

20206067591 is an equidigital number, since it uses as much as digits as its factorization.

20206067591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 20206067591 in words is "twenty billion, two hundred six million, sixty-seven thousand, five hundred ninety-one".