20456323 has 2 divisors, whose sum is σ = 20456324. Its totient is φ = 20456322.

The previous prime is 20456309. The next prime is 20456329. The reversal of 20456323 is 32365402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20456323 is a prime.

It is a super-2 number, since 2×20456323² = 836922301360658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20456329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228161 + 10228162.

It is an arithmetic number, because the mean of its divisors is an integer number (10228162).

Almost surely, 2^20456323 is an apocalyptic number.

20456323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20456323 is an equidigital number, since it uses as much as digits as its factorization.

20456323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20456323 is about 4522.8666794413. The cubic root of 20456323 is about 273.4906756533.

The spelling of 20456323 in words is "twenty million, four hundred fifty-six thousand, three hundred twenty-three".