18426330 has 48 divisors (see below), whose sum is σ = 51597000. Its totient is φ = 4535424.

The previous prime is 18426313. The next prime is 18426337. The reversal of 18426330 is 3362481.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5745609 + 12680721 = 2397^2 + 3561^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18426294 and 18426303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18426337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6705 + ... + 9044.

Almost surely, 2^18426330 is an apocalyptic number.

18426330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18426330 is an abundant number, since it is smaller than the sum of its proper divisors (33170670).

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

18426330 is a wasteful number, since it uses less digits than its factorization.

18426330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15775 (or 15772 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 18426330 is about 4292.5901271843. The cubic root of 18426330 is about 264.1270910117.

The spelling of 18426330 in words is "eighteen million, four hundred twenty-six thousand, three hundred thirty".