23229820 has 36 divisors (see below), whose sum is σ = 51833880. Its totient is φ = 8743168.

The previous prime is 23229781. The next prime is 23229823. The reversal of 23229820 is 2892232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23229823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3771 + ... + 7789.

It is an arithmetic number, because the mean of its divisors is an integer number (1439830).

Almost surely, 2^23229820 is an apocalyptic number.

23229820 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 23229820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25916940).

23229820 is an abundant number, since it is smaller than the sum of its proper divisors (28604060).

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

23229820 is a wasteful number, since it uses less digits than its factorization.

23229820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062 (or 4043 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 23229820 is about 4819.7323577145. The cubic root of 23229820 is about 285.3307742562.

The spelling of 23229820 in words is "twenty-three million, two hundred twenty-nine thousand, eight hundred twenty".