23353220 has 48 divisors (see below), whose sum is σ = 54081216. Its totient is φ = 8400000.

The previous prime is 23353201. The next prime is 23353237. The reversal of 23353220 is 2235332.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 23353192 and 23353201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21695 + ... + 22745.

It is an arithmetic number, because the mean of its divisors is an integer number (1126692).

Almost surely, 2^23353220 is an apocalyptic number.

23353220 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 23353220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27040608).

23353220 is an abundant number, since it is smaller than the sum of its proper divisors (30727996).

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

23353220 is a wasteful number, since it uses less digits than its factorization.

23353220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 23353220 is about 4832.5169425466. The cubic root of 23353220 is about 285.8351210315.

Adding to 23353220 its reverse (2235332), we get a palindrome (25588552).

It can be divided in two parts, 2335 and 3220, that added together give a palindrome (5555).

The spelling of 23353220 in words is "twenty-three million, three hundred fifty-three thousand, two hundred twenty".