18374720 has 112 divisors (see below), whose sum is σ = 53937408. Its totient is φ = 5806080.

The previous prime is 18374711. The next prime is 18374747. The reversal of 18374720 is 2747381.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 28805 + ... + 29435.

It is an arithmetic number, because the mean of its divisors is an integer number (481584).

Almost surely, 2^18374720 is an apocalyptic number.

18374720 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 18374720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26968704).

18374720 is an abundant number, since it is smaller than the sum of its proper divisors (35562688).

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

18374720 is a wasteful number, since it uses less digits than its factorization.

18374720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 18374720 is about 4286.5743898829. The cubic root of 18374720 is about 263.8802640374.

The spelling of 18374720 in words is "eighteen million, three hundred seventy-four thousand, seven hundred twenty".