18474444371 has 2 divisors, whose sum is σ = 18474444372. Its totient is φ = 18474444370.

The previous prime is 18474444367. The next prime is 18474444379. The reversal of 18474444371 is 17344447481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18474444371 - 2² = 18474444367 is a prime.

It is not a weakly prime, because it can be changed into another prime (18474444379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9237222185 + 9237222186.

It is an arithmetic number, because the mean of its divisors is an integer number (9237222186).

Almost surely, 2^18474444371 is an apocalyptic number.

18474444371 is a deficient number, since it is larger than the sum of its proper divisors (1).

18474444371 is an equidigital number, since it uses as much as digits as its factorization.

18474444371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1204224, while the sum is 47.

The spelling of 18474444371 in words is "eighteen billion, four hundred seventy-four million, four hundred forty-four thousand, three hundred seventy-one".