18246720 has 112 divisors (see below), whose sum is σ = 58887360. Its totient is φ = 4786176.

The previous prime is 18246719. The next prime is 18246737. The reversal of 18246720 is 2764281.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79566 + ... + 79794.

It is an arithmetic number, because the mean of its divisors is an integer number (525780).

Almost surely, 2^18246720 is an apocalyptic number.

18246720 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 18246720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29443680).

18246720 is an abundant number, since it is smaller than the sum of its proper divisors (40640640).

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

18246720 is a wasteful number, since it uses less digits than its factorization.

18246720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 18246720 is about 4271.6179604454. The cubic root of 18246720 is about 263.2660975953.

The spelling of 18246720 in words is "eighteen million, two hundred forty-six thousand, seven hundred twenty".