23021724 has 24 divisors (see below), whose sum is σ = 58601088. Its totient is φ = 6976240.

The previous prime is 23021717. The next prime is 23021729. The reversal of 23021724 is 42712032.

It is a self number, because there is not a number n which added to its sum of digits gives 23021724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87072 + ... + 87335.

It is an arithmetic number, because the mean of its divisors is an integer number (2441712).

Almost surely, 2^23021724 is an apocalyptic number.

It is an amenable number.

23021724 is an abundant number, since it is smaller than the sum of its proper divisors (35579364).

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

23021724 is a wasteful number, since it uses less digits than its factorization.

23021724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174425 (or 174423 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 23021724 is about 4798.0958723227. The cubic root of 23021724 is about 284.4762062831.

Adding to 23021724 its reverse (42712032), we get a palindrome (65733756).

The spelling of 23021724 in words is "twenty-three million, twenty-one thousand, seven hundred twenty-four".