18026841461 has 2 divisors, whose sum is σ = 18026841462. Its totient is φ = 18026841460.

The previous prime is 18026841449. The next prime is 18026841499. The reversal of 18026841461 is 16414862081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13737246436 + 4289595025 = 117206^2 + 65495^2 .

It is a cyclic number.

It is not a de Polignac number, because 18026841461 - 2¹⁸ = 18026579317 is a prime.

It is a super-2 number, since 2×18026841461² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18026841431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9013420730 + 9013420731.

It is an arithmetic number, because the mean of its divisors is an integer number (9013420731).

Almost surely, 2^18026841461 is an apocalyptic number.

It is an amenable number.

18026841461 is a deficient number, since it is larger than the sum of its proper divisors (1).

18026841461 is an equidigital number, since it uses as much as digits as its factorization.

18026841461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 18026841461 in words is "eighteen billion, twenty-six million, eight hundred forty-one thousand, four hundred sixty-one".