18323480 has 64 divisors (see below), whose sum is σ = 48660480. Its totient is φ = 6076800.

The previous prime is 18323477. The next prime is 18323483. The reversal of 18323480 is 8432381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18323477) and next prime (18323483).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18323483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7625 + ... + 9735.

It is an arithmetic number, because the mean of its divisors is an integer number (760320).

Almost surely, 2^18323480 is an apocalyptic number.

18323480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18323480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24330240).

18323480 is an abundant number, since it is smaller than the sum of its proper divisors (30337000).

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

18323480 is a wasteful number, since it uses less digits than its factorization.

18323480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160 (or 2156 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 18323480 is about 4280.5934168057. The cubic root of 18323480 is about 263.6347489542.

The spelling of 18323480 in words is "eighteen million, three hundred twenty-three thousand, four hundred eighty".