23721573 has 8 divisors (see below), whose sum is σ = 31737888. Its totient is φ = 15759824.

The previous prime is 23721571. The next prime is 23721589. The reversal of 23721573 is 37512732.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23721573 - 2¹ = 23721571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23721573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23721571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12615 + ... + 14372.

It is an arithmetic number, because the mean of its divisors is an integer number (3967236).

Almost surely, 2^23721573 is an apocalyptic number.

It is an amenable number.

23721573 is a deficient number, since it is larger than the sum of its proper divisors (8016315).

23721573 is a wasteful number, since it uses less digits than its factorization.

23721573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27283.

The product of its digits is 8820, while the sum is 30.

The square root of 23721573 is about 4870.4797504969. The cubic root of 23721573 is about 287.3301247242.

The spelling of 23721573 in words is "twenty-three million, seven hundred twenty-one thousand, five hundred seventy-three".