22665823 has 2 divisors, whose sum is σ = 22665824. Its totient is φ = 22665822.

The previous prime is 22665781. The next prime is 22665847. The reversal of 22665823 is 32856622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22665823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22665323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11332911 + 11332912.

It is an arithmetic number, because the mean of its divisors is an integer number (11332912).

Almost surely, 2^22665823 is an apocalyptic number.

22665823 is a deficient number, since it is larger than the sum of its proper divisors (1).

22665823 is an equidigital number, since it uses as much as digits as its factorization.

22665823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 22665823 is about 4760.8636821484. The cubic root of 22665823 is about 283.0026470304.

It can be divided in two parts, 226 and 65823, that added together give a square (66049 = 257²).

The spelling of 22665823 in words is "twenty-two million, six hundred sixty-five thousand, eight hundred twenty-three".