18226424 has 8 divisors (see below), whose sum is σ = 34174560. Its totient is φ = 9113208.

The previous prime is 18226409. The next prime is 18226433. The reversal of 18226424 is 42462281.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139144 + ... + 1139159.

It is an arithmetic number, because the mean of its divisors is an integer number (4271820).

Almost surely, 2^18226424 is an apocalyptic number.

It is an amenable number.

18226424 is a deficient number, since it is larger than the sum of its proper divisors (15948136).

18226424 is a wasteful number, since it uses less digits than its factorization.

18226424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278309 (or 2278305 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 18226424 is about 4269.2416188358. The cubic root of 18226424 is about 263.1684502545.

The spelling of 18226424 in words is "eighteen million, two hundred twenty-six thousand, four hundred twenty-four".