18360720 has 120 divisors (see below), whose sum is σ = 70489536. Its totient is φ = 4195584.

The previous prime is 18360659. The next prime is 18360721. The reversal of 18360720 is 2706381.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (18360721) 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, 3219 + ... + 6861.

Almost surely, 2^18360720 is an apocalyptic number.

18360720 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 18360720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35244768).

18360720 is an abundant number, since it is smaller than the sum of its proper divisors (52128816).

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

18360720 is a wasteful number, since it uses less digits than its factorization.

18360720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3669 (or 3660 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 18360720 is about 4284.9410731071. The cubic root of 18360720 is about 263.8132287783.

The spelling of 18360720 in words is "eighteen million, three hundred sixty thousand, seven hundred twenty".