23041821 has 16 divisors (see below), whose sum is σ = 33845760. Its totient is φ = 13827120.

The previous prime is 23041789. The next prime is 23041829. The reversal of 23041821 is 12814032.

It is not a de Polignac number, because 23041821 - 2⁵ = 23041789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23041829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (2115360).

Almost surely, 2^23041821 is an apocalyptic number.

It is an amenable number.

23041821 is a deficient number, since it is larger than the sum of its proper divisors (10803939).

23041821 is a wasteful number, since it uses less digits than its factorization.

23041821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6896.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 23041821 is about 4800.1896837521. The cubic root of 23041821 is about 284.5589608084.

Adding to 23041821 its reverse (12814032), we get a palindrome (35855853).

The spelling of 23041821 in words is "twenty-three million, forty-one thousand, eight hundred twenty-one".