18069847 has 12 divisors (see below), whose sum is σ = 19022344. Its totient is φ = 17151120.

The previous prime is 18069841. The next prime is 18069851. The reversal of 18069847 is 74896081.

It is not a de Polignac number, because 18069847 - 2⁷ = 18069719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18069841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217668 + ... + 217750.

Almost surely, 2^18069847 is an apocalyptic number.

18069847 is a deficient number, since it is larger than the sum of its proper divisors (952497).

18069847 is an frugal number, since it uses more digits than its factorization.

18069847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 18069847 is about 4250.8642650642. The cubic root of 18069847 is about 262.4126850944.

The spelling of 18069847 in words is "eighteen million, sixty-nine thousand, eight hundred forty-seven".