18226548 has 36 divisors (see below), whose sum is σ = 48499360. Its totient is φ = 5755536.

The previous prime is 18226517. The next prime is 18226573. The reversal of 18226548 is 84562281.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×18226548³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12640 + ... + 14007.

Almost surely, 2^18226548 is an apocalyptic number.

18226548 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18226548 is an abundant number, since it is smaller than the sum of its proper divisors (30272812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18226548 is a wasteful number, since it uses less digits than its factorization.

18226548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26676 (or 26671 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 18226548 is about 4269.2561412967. The cubic root of 18226548 is about 263.1690470586.

The spelling of 18226548 in words is "eighteen million, two hundred twenty-six thousand, five hundred forty-eight".