23243220 has 384 divisors, whose sum is σ = 99348480. Its totient is φ = 4354560.

The previous prime is 23243201. The next prime is 23243221. The reversal of 23243220 is 2234232.

23243220 is a `hidden beast` number, since 232 + 432 + 2 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 23243193 and 23243202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23243221) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 540519 + ... + 540561.

It is an arithmetic number, because the mean of its divisors is an integer number (258720).

Almost surely, 2^23243220 is an apocalyptic number.

23243220 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 23243220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49674240).

23243220 is an abundant number, since it is smaller than the sum of its proper divisors (76105260).

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

23243220 is a wasteful number, since it uses less digits than its factorization.

23243220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 23243220 is about 4821.1222759851. The cubic root of 23243220 is about 285.3856275645.

Adding to 23243220 its reverse (2234232), we get a palindrome (25477452).

The spelling of 23243220 in words is "twenty-three million, two hundred forty-three thousand, two hundred twenty".