23196821 has 2 divisors, whose sum is σ = 23196822. Its totient is φ = 23196820.

The previous prime is 23196799. The next prime is 23196827. The reversal of 23196821 is 12869132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 4056196 = 4375^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 23196821 - 2¹⁰ = 23195797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23196827) 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 as a sum of consecutive naturals, namely, 11598410 + 11598411.

It is an arithmetic number, because the mean of its divisors is an integer number (11598411).

Almost surely, 2^23196821 is an apocalyptic number.

It is an amenable number.

23196821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23196821 is an equidigital number, since it uses as much as digits as its factorization.

23196821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 23196821 is about 4816.3078182359. The cubic root of 23196821 is about 285.1956018473.

The spelling of 23196821 in words is "twenty-three million, one hundred ninety-six thousand, eight hundred twenty-one".