20042273 has 2 divisors, whose sum is σ = 20042274. Its totient is φ = 20042272.

The previous prime is 20042263. The next prime is 20042279. The reversal of 20042273 is 37224002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 123904 = 4463^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 20042273 - 2²⁰ = 18993697 is a prime.

It is not a weakly prime, because it can be changed into another prime (20042279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021136 + 10021137.

It is an arithmetic number, because the mean of its divisors is an integer number (10021137).

Almost surely, 2^20042273 is an apocalyptic number.

It is an amenable number.

20042273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042273 is an equidigital number, since it uses as much as digits as its factorization.

20042273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20042273 is about 4476.8597252985. The cubic root of 20042273 is about 271.6328713695.

Adding to 20042273 its reverse (37224002), we get a palindrome (57266275).

The spelling of 20042273 in words is "twenty million, forty-two thousand, two hundred seventy-three".