18427469 has 4 divisors (see below), whose sum is σ = 18440544. Its totient is φ = 18414396.

The previous prime is 18427427. The next prime is 18427477. The reversal of 18427469 is 96472481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18427469 is a prime.

It is a super-2 number, since 2×18427469² = 679143227491922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18447469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4127 + ... + 7340.

It is an arithmetic number, because the mean of its divisors is an integer number (4610136).

Almost surely, 2^18427469 is an apocalyptic number.

It is an amenable number.

18427469 is a deficient number, since it is larger than the sum of its proper divisors (13075).

18427469 is a wasteful number, since it uses less digits than its factorization.

18427469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13074.

The product of its digits is 96768, while the sum is 41.

The square root of 18427469 is about 4292.7227956159. The cubic root of 18427469 is about 264.1325331256.

The spelling of 18427469 in words is "eighteen million, four hundred twenty-seven thousand, four hundred sixty-nine".