18501835158643 has 2 divisors, whose sum is σ = 18501835158644. Its totient is φ = 18501835158642.

The previous prime is 18501835158629. The next prime is 18501835158661. The reversal of 18501835158643 is 34685153810581.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18501835158643 is a prime.

It is not a weakly prime, because it can be changed into another prime (18501835158043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9250917579321 + 9250917579322.

It is an arithmetic number, because the mean of its divisors is an integer number (9250917579322).

Almost surely, 2^{18501835158643} is an apocalyptic number.

18501835158643 is a deficient number, since it is larger than the sum of its proper divisors (1).

18501835158643 is an equidigital number, since it uses as much as digits as its factorization.

18501835158643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824000, while the sum is 58.

The spelling of 18501835158643 in words is "eighteen trillion, five hundred one billion, eight hundred thirty-five million, one hundred fifty-eight thousand, six hundred forty-three".