23098821 has 4 divisors (see below), whose sum is σ = 30798432. Its totient is φ = 15399212.

The previous prime is 23098811. The next prime is 23098843. The reversal of 23098821 is 12889032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23098821 - 2¹⁰ = 23097797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23098811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3849801 + ... + 3849806.

It is an arithmetic number, because the mean of its divisors is an integer number (7699608).

Almost surely, 2^23098821 is an apocalyptic number.

It is an amenable number.

23098821 is a deficient number, since it is larger than the sum of its proper divisors (7699611).

23098821 is an equidigital number, since it uses as much as digits as its factorization.

23098821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7699610.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 23098821 is about 4806.1232818146. The cubic root of 23098821 is about 284.7934113815.

The spelling of 23098821 in words is "twenty-three million, ninety-eight thousand, eight hundred twenty-one".