23023721 has 8 divisors (see below), whose sum is σ = 26347200. Its totient is φ = 19708848.

The previous prime is 23023717. The next prime is 23023727. The reversal of 23023721 is 12732032.

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 23023721 - 2² = 23023717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23023693 and 23023702.

It is not an unprimeable number, because it can be changed into a prime (23023727) 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, 5330 + ... + 8628.

It is an arithmetic number, because the mean of its divisors is an integer number (3293400).

Almost surely, 2^23023721 is an apocalyptic number.

It is an amenable number.

23023721 is a deficient number, since it is larger than the sum of its proper divisors (3323479).

23023721 is an equidigital number, since it uses as much as digits as its factorization.

23023721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 23023721 is about 4798.3039711965. The cubic root of 23023721 is about 284.4844315946.

Adding to 23023721 its reverse (12732032), we get a palindrome (35755753).

The spelling of 23023721 in words is "twenty-three million, twenty-three thousand, seven hundred twenty-one".