18426229 has 4 divisors (see below), whose sum is σ = 18440800. Its totient is φ = 18411660.

The previous prime is 18426227. The next prime is 18426241. The reversal of 18426229 is 92262481.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92262481 = 401 ⋅230081.

It is a cyclic number.

It is not a de Polignac number, because 18426229 - 2¹ = 18426227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18426194 and 18426203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18426227) 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, 5187 + ... + 7984.

It is an arithmetic number, because the mean of its divisors is an integer number (4610200).

Almost surely, 2^18426229 is an apocalyptic number.

It is an amenable number.

18426229 is a deficient number, since it is larger than the sum of its proper divisors (14571).

18426229 is a wasteful number, since it uses less digits than its factorization.

18426229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14570.

The product of its digits is 13824, while the sum is 34.

The square root of 18426229 is about 4292.5783627093. The cubic root of 18426229 is about 264.1266084254.

The spelling of 18426229 in words is "eighteen million, four hundred twenty-six thousand, two hundred twenty-nine".