18226396 has 24 divisors (see below), whose sum is σ = 35038080. Its totient is φ = 8257392.

The previous prime is 18226393. The next prime is 18226409. The reversal of 18226396 is 69362281.

It is a super-2 number, since 2×18226396² = 664403022297632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18226393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3466 + ... + 6961.

It is an arithmetic number, because the mean of its divisors is an integer number (1459920).

Almost surely, 2^18226396 is an apocalyptic number.

It is an amenable number.

18226396 is a deficient number, since it is larger than the sum of its proper divisors (16811684).

18226396 is a wasteful number, since it uses less digits than its factorization.

18226396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10473 (or 10471 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 18226396 is about 4269.2383395636. The cubic root of 18226396 is about 263.1683154919.

The spelling of 18226396 in words is "eighteen million, two hundred twenty-six thousand, three hundred ninety-six".