22123800 has 192 divisors, whose sum is σ = 81021600. Its totient is φ = 5529600.

The previous prime is 22123799. The next prime is 22123807. The reversal of 22123800 is 832122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91680 + ... + 91920.

Almost surely, 2^22123800 is an apocalyptic number.

22123800 is a gapful number since it is divisible by the number (20) 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 22123800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40510800).

22123800 is an abundant number, since it is smaller than the sum of its proper divisors (58897800).

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

22123800 is a wasteful number, since it uses less digits than its factorization.

22123800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22123800 is about 4703.5943702662. The cubic root of 22123800 is about 280.7285448982.

Adding to 22123800 its reverse (832122), we get a palindrome (22955922).

The spelling of 22123800 in words is "twenty-two million, one hundred twenty-three thousand, eight hundred".