18474444379 has 2 divisors, whose sum is σ = 18474444380. Its totient is φ = 18474444378.

The previous prime is 18474444371. The next prime is 18474444397. The reversal of 18474444379 is 97344447481.

Together with next prime (18474444397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18474444379 - 2³ = 18474444371 is a prime.

It is a super-2 number, since 2×18474444379² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18474444371) 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, 9237222189 + 9237222190.

It is an arithmetic number, because the mean of its divisors is an integer number (9237222190).

Almost surely, 2^18474444379 is an apocalyptic number.

18474444379 is a deficient number, since it is larger than the sum of its proper divisors (1).

18474444379 is an equidigital number, since it uses as much as digits as its factorization.

18474444379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10838016, while the sum is 55.

The spelling of 18474444379 in words is "eighteen billion, four hundred seventy-four million, four hundred forty-four thousand, three hundred seventy-nine".