20002273 has 4 divisors (see below), whose sum is σ = 20208580. Its totient is φ = 19795968.

The previous prime is 20002261. The next prime is 20002313. The reversal of 20002273 is 37220002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13712209 + 6290064 = 3703^2 + 2508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002273 is a prime.

It is a deceptive number, since it divides R_20002272.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103008 + ... + 103201.

It is an arithmetic number, because the mean of its divisors is an integer number (5052145).

Almost surely, 2^20002273 is an apocalyptic number.

It is an amenable number.

20002273 is a deficient number, since it is larger than the sum of its proper divisors (206307).

20002273 is an equidigital number, since it uses as much as digits as its factorization.

20002273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206306.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20002273 is about 4472.3900769052. The cubic root of 20002273 is about 271.4520443887.

Adding to 20002273 its reverse (37220002), we get a palindrome (57222275).

The spelling of 20002273 in words is "twenty million, two thousand, two hundred seventy-three".