18835331572091 has 2 divisors, whose sum is σ = 18835331572092. Its totient is φ = 18835331572090.

The previous prime is 18835331572063. The next prime is 18835331572201. The reversal of 18835331572091 is 19027513353881.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18835331572091 is a prime.

It is a super-2 number, since 2×18835331572091² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18835331572991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9417665786045 + 9417665786046.

It is an arithmetic number, because the mean of its divisors is an integer number (9417665786046).

Almost surely, 2^{18835331572091} is an apocalyptic number.

18835331572091 is a deficient number, since it is larger than the sum of its proper divisors (1).

18835331572091 is an equidigital number, since it uses as much as digits as its factorization.

18835331572091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 18835331572091 in words is "eighteen trillion, eight hundred thirty-five billion, three hundred thirty-one million, five hundred seventy-two thousand, ninety-one".