23083821 has 12 divisors (see below), whose sum is σ = 33405372. Its totient is φ = 15360576.

The previous prime is 23083813. The next prime is 23083831. The reversal of 23083821 is 12838032.

It can be written as a sum of positive squares in 2 ways, for example, as 4473225 + 18610596 = 2115^2 + 4314^2 .

It is not a de Polignac number, because 23083821 - 2³ = 23083813 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 (23083831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3475 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (2783781).

Almost surely, 2^23083821 is an apocalyptic number.

It is an amenable number.

23083821 is a deficient number, since it is larger than the sum of its proper divisors (10321551).

23083821 is a wasteful number, since it uses less digits than its factorization.

23083821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780 (or 4777 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 23083821 is about 4804.5625191062. The cubic root of 23083821 is about 284.7317512907.

The spelling of 23083821 in words is "twenty-three million, eighty-three thousand, eight hundred twenty-one".