18025047 has 6 divisors (see below), whose sum is σ = 26036192. Its totient is φ = 12016692.

The previous prime is 18025019. The next prime is 18025061. The reversal of 18025047 is 74052081.

It is not a de Polignac number, because 18025047 - 2¹⁴ = 18008663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18025047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18005047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1001383 + ... + 1001400.

Almost surely, 2^18025047 is an apocalyptic number.

18025047 is a deficient number, since it is larger than the sum of its proper divisors (8011145).

18025047 is a wasteful number, since it uses less digits than its factorization.

18025047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002789 (or 2002786 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18025047 is about 4245.5914782277. The cubic root of 18025047 is about 262.1956418031.

The spelling of 18025047 in words is "eighteen million, twenty-five thousand, forty-seven".