20266223 has 2 divisors, whose sum is σ = 20266224. Its totient is φ = 20266222.

The previous prime is 20266199. The next prime is 20266229. The reversal of 20266223 is 32266202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20266223 - 2¹⁰ = 20265199 is a prime.

It is equal to p_1286420 and since 20266223 and 1286420 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20266229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10133111 + 10133112.

It is an arithmetic number, because the mean of its divisors is an integer number (10133112).

Almost surely, 2^20266223 is an apocalyptic number.

20266223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20266223 is an equidigital number, since it uses as much as digits as its factorization.

20266223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20266223 is about 4501.8021946771. The cubic root of 20266223 is about 272.6408575140.

The spelling of 20266223 in words is "twenty million, two hundred sixty-six thousand, two hundred twenty-three".