23745220 has 12 divisors (see below), whose sum is σ = 49865004. Its totient is φ = 9498080.

The previous prime is 23745217. The next prime is 23745247. The reversal of 23745220 is 2254732.

It can be written as a sum of positive squares in 2 ways, for example, as 8111104 + 15634116 = 2848^2 + 3954^2 .

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 3 ways as a sum of consecutive naturals, for example, 593611 + ... + 593650.

It is an arithmetic number, because the mean of its divisors is an integer number (4155417).

Almost surely, 2^23745220 is an apocalyptic number.

23745220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23745220 is an abundant number, since it is smaller than the sum of its proper divisors (26119784).

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

23745220 is a wasteful number, since it uses less digits than its factorization.

23745220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187270 (or 1187268 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 23745220 is about 4872.9067300740. The cubic root of 23745220 is about 287.4255686337.

Adding to 23745220 its reverse (2254732), we get a palindrome (25999952).

The spelling of 23745220 in words is "twenty-three million, seven hundred forty-five thousand, two hundred twenty".