18444033869 has 2 divisors, whose sum is σ = 18444033870. Its totient is φ = 18444033868.

The previous prime is 18444033827. The next prime is 18444033877. The reversal of 18444033869 is 96833044481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17493236644 + 950797225 = 132262^2 + 30835^2 .

It is a cyclic number.

It is not a de Polignac number, because 18444033869 - 2³² = 14149066573 is a prime.

It is a super-2 number, since 2×18444033869² (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 (18444033809) 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, 9222016934 + 9222016935.

It is an arithmetic number, because the mean of its divisors is an integer number (9222016935).

Almost surely, 2^18444033869 is an apocalyptic number.

It is an amenable number.

18444033869 is a deficient number, since it is larger than the sum of its proper divisors (1).

18444033869 is an equidigital number, since it uses as much as digits as its factorization.

18444033869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 18444033869 in words is "eighteen billion, four hundred forty-four million, thirty-three thousand, eight hundred sixty-nine".