23733721 has 8 divisors (see below), whose sum is σ = 26493984. Its totient is φ = 21073920.

The previous prime is 23733707. The next prime is 23733737. The reversal of 23733721 is 12733732.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23733721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23733721.

It is not an unprimeable number, because it can be changed into a prime (23733701) 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, 24616 + ... + 25561.

It is an arithmetic number, because the mean of its divisors is an integer number (3311748).

Almost surely, 2^23733721 is an apocalyptic number.

It is an amenable number.

23733721 is a deficient number, since it is larger than the sum of its proper divisors (2760263).

23733721 is a wasteful number, since it uses less digits than its factorization.

23733721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50231.

The product of its digits is 5292, while the sum is 28.

The square root of 23733721 is about 4871.7266959467. The cubic root of 23733721 is about 287.3791643430.

The spelling of 23733721 in words is "twenty-three million, seven hundred thirty-three thousand, seven hundred twenty-one".