18015030 has 96 divisors (see below), whose sum is σ = 52835328. Its totient is φ = 4219200.

The previous prime is 18015029. The next prime is 18015073. The reversal of 18015030 is 3051081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 18014994 and 18015012.

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, 30397 + ... + 30983.

It is an arithmetic number, because the mean of its divisors is an integer number (550368).

Almost surely, 2^18015030 is an apocalyptic number.

18015030 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 18015030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26417664).

18015030 is an abundant number, since it is smaller than the sum of its proper divisors (34820298).

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

18015030 is a wasteful number, since it uses less digits than its factorization.

18015030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 18015030 is about 4244.4116200011. The cubic root of 18015030 is about 262.1470630964.

The spelling of 18015030 in words is "eighteen million, fifteen thousand, thirty".