18074899 has 2 divisors, whose sum is σ = 18074900. Its totient is φ = 18074898.

The previous prime is 18074897. The next prime is 18074923. The reversal of 18074899 is 99847081.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99847081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18074899 - 2¹ = 18074897 is a prime.

Together with 18074897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18074897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9037449 + 9037450.

It is an arithmetic number, because the mean of its divisors is an integer number (9037450).

Almost surely, 2^18074899 is an apocalyptic number.

18074899 is a deficient number, since it is larger than the sum of its proper divisors (1).

18074899 is an equidigital number, since it uses as much as digits as its factorization.

18074899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 18074899 is about 4251.4584556361. The cubic root of 18074899 is about 262.4371380842.

The spelling of 18074899 in words is "eighteen million, seventy-four thousand, eight hundred ninety-nine".