18258030 has 96 divisors (see below), whose sum is σ = 55134144. Its totient is φ = 4105728.

The previous prime is 18258029. The next prime is 18258047. The reversal of 18258030 is 3085281.

Added to its reverse (3085281) it gives a triangular number (21343311 = T₆₅₃₃).

It is a happy number.

18258030 is a `hidden beast` number, since 1 + 82 + 580 + 3 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18257985 and 18258003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45792 + ... + 46188.

It is an arithmetic number, because the mean of its divisors is an integer number (574314).

Almost surely, 2^18258030 is an apocalyptic number.

18258030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18258030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27567072).

18258030 is an abundant number, since it is smaller than the sum of its proper divisors (36876114).

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

18258030 is a wasteful number, since it uses less digits than its factorization.

18258030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18258030 is about 4272.9416097110. The cubic root of 18258030 is about 263.3204804209.

Adding to 18258030 its reverse (3085281), we get a triangular number (21343311 = T₆₅₃₃).

The spelling of 18258030 in words is "eighteen million, two hundred fifty-eight thousand, thirty".