20272243 has 2 divisors, whose sum is σ = 20272244. Its totient is φ = 20272242.

The previous prime is 20272229. The next prime is 20272249. The reversal of 20272243 is 34227202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20272243 - 2¹⁷ = 20141171 is a prime.

It is not a weakly prime, because it can be changed into another prime (20272249) 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, 10136121 + 10136122.

It is an arithmetic number, because the mean of its divisors is an integer number (10136122).

Almost surely, 2^20272243 is an apocalyptic number.

20272243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20272243 is an equidigital number, since it uses as much as digits as its factorization.

20272243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20272243 is about 4502.4707661461. The cubic root of 20272243 is about 272.6678504647.

Adding to 20272243 its reverse (34227202), we get a palindrome (54499445).

The spelling of 20272243 in words is "twenty million, two hundred seventy-two thousand, two hundred forty-three".