18223800 has 96 divisors (see below), whose sum is σ = 64579200. Its totient is φ = 4164480.

The previous prime is 18223781. The next prime is 18223817. The reversal of 18223800 is 832281.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2031 + ... + 6369.

It is an arithmetic number, because the mean of its divisors is an integer number (672700).

Almost surely, 2^18223800 is an apocalyptic number.

18223800 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 18223800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32289600).

18223800 is an abundant number, since it is smaller than the sum of its proper divisors (46355400).

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

18223800 is a wasteful number, since it uses less digits than its factorization.

18223800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365 (or 4356 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18223800 is about 4268.9342932399. The cubic root of 18223800 is about 263.1558204749.

The spelling of 18223800 in words is "eighteen million, two hundred twenty-three thousand, eight hundred".