20158460591 has 2 divisors, whose sum is σ = 20158460592. Its totient is φ = 20158460590.

The previous prime is 20158460537. The next prime is 20158460627. The reversal of 20158460591 is 19506485102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20158460591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20158460291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10079230295 + 10079230296.

It is an arithmetic number, because the mean of its divisors is an integer number (10079230296).

Almost surely, 2^20158460591 is an apocalyptic number.

20158460591 is a deficient number, since it is larger than the sum of its proper divisors (1).

20158460591 is an equidigital number, since it uses as much as digits as its factorization.

20158460591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 20158460591 in words is "twenty billion, one hundred fifty-eight million, four hundred sixty thousand, five hundred ninety-one".