18190424641 has 2 divisors, whose sum is σ = 18190424642. Its totient is φ = 18190424640.

The previous prime is 18190424597. The next prime is 18190424671. The reversal of 18190424641 is 14642409181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10978848400 + 7211576241 = 104780^2 + 84921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18190424641 is a prime.

It is a super-3 number, since 3×18190424641³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18190424594 and 18190424603.

It is not a weakly prime, because it can be changed into another prime (18190424671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9095212320 + 9095212321.

It is an arithmetic number, because the mean of its divisors is an integer number (9095212321).

Almost surely, 2^18190424641 is an apocalyptic number.

It is an amenable number.

18190424641 is a deficient number, since it is larger than the sum of its proper divisors (1).

18190424641 is an equidigital number, since it uses as much as digits as its factorization.

18190424641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 18190424641 in words is "eighteen billion, one hundred ninety million, four hundred twenty-four thousand, six hundred forty-one".