20273213 has 2 divisors, whose sum is σ = 20273214. Its totient is φ = 20273212.

The previous prime is 20273207. The next prime is 20273243. The reversal of 20273213 is 31237202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 41209 = 4498^2 + 203^2 .

It is a cyclic number.

It is not a de Polignac number, because 20273213 - 2⁸ = 20272957 is a prime.

It is a super-2 number, since 2×20273213² = 822006330686738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20273203) 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, 10136606 + 10136607.

It is an arithmetic number, because the mean of its divisors is an integer number (10136607).

Almost surely, 2^20273213 is an apocalyptic number.

It is an amenable number.

20273213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20273213 is an equidigital number, since it uses as much as digits as its factorization.

20273213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20273213 is about 4502.5784834914. The cubic root of 20273213 is about 272.6721993273.

The spelling of 20273213 in words is "twenty million, two hundred seventy-three thousand, two hundred thirteen".