18196873371641 has 16 divisors (see below), whose sum is σ = 18297982769040. Its totient is φ = 18095975500800.

The previous prime is 18196873371637. The next prime is 18196873371659. The reversal of 18196873371641 is 14617337869181.

It can be written as a sum of positive squares in 8 ways, for example, as 63413816041 + 18133459555600 = 251821^2 + 4258340^2 .

It is a cyclic number.

It is not a de Polignac number, because 18196873371641 - 2² = 18196873371637 is a prime.

It is a super-2 number, since 2×18196873371641² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18196873371601) 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 in 15 ways as a sum of consecutive naturals, for example, 634708655 + ... + 634737323.

It is an arithmetic number, because the mean of its divisors is an integer number (1143623923065).

Almost surely, 2^{18196873371641} is an apocalyptic number.

It is an amenable number.

18196873371641 is a deficient number, since it is larger than the sum of its proper divisors (101109397399).

18196873371641 is a wasteful number, since it uses less digits than its factorization.

18196873371641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32236.

The product of its digits is 36578304, while the sum is 65.

The spelling of 18196873371641 in words is "eighteen trillion, one hundred ninety-six billion, eight hundred seventy-three million, three hundred seventy-one thousand, six hundred forty-one".