18074447 has 2 divisors, whose sum is σ = 18074448. Its totient is φ = 18074446.

The previous prime is 18074443. The next prime is 18074467. The reversal of 18074447 is 74447081.

It is a weak prime.

It is an emirp because it is prime and its reverse (74447081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18074447 - 2² = 18074443 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18074443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9037223 + 9037224.

It is an arithmetic number, because the mean of its divisors is an integer number (9037224).

Almost surely, 2^18074447 is an apocalyptic number.

18074447 is a deficient number, since it is larger than the sum of its proper divisors (1).

18074447 is an equidigital number, since it uses as much as digits as its factorization.

18074447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 18074447 is about 4251.4052970753. The cubic root of 18074447 is about 262.4349504726.

The spelling of 18074447 in words is "eighteen million, seventy-four thousand, four hundred forty-seven".