18343100 has 36 divisors (see below), whose sum is σ = 40492200. Its totient is φ = 7210560.

The previous prime is 18343099. The next prime is 18343111. The reversal of 18343100 is 134381.

It is a happy number.

It is a super-2 number, since 2×18343100² = 672938635220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4346 + ... + 7454.

Almost surely, 2^18343100 is an apocalyptic number.

18343100 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 18343100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20246100).

18343100 is an abundant number, since it is smaller than the sum of its proper divisors (22149100).

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

18343100 is a wasteful number, since it uses less digits than its factorization.

18343100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182 (or 3175 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 18343100 is about 4282.8845419880. The cubic root of 18343100 is about 263.7288116669.

Adding to 18343100 its reverse (134381), we get a palindrome (18477481).

The spelling of 18343100 in words is "eighteen million, three hundred forty-three thousand, one hundred".