20740273 has 4 divisors (see below), whose sum is σ = 21642048. Its totient is φ = 19838500.

The previous prime is 20740261. The next prime is 20740297. The reversal of 20740273 is 37204702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20740273 - 2⁵ = 20740241 is a prime.

It is a super-2 number, since 2×20740273² = 860317848229058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20740253) 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 in 3 ways as a sum of consecutive naturals, for example, 450853 + ... + 450898.

It is an arithmetic number, because the mean of its divisors is an integer number (5410512).

Almost surely, 2^20740273 is an apocalyptic number.

20740273 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20740273 is a deficient number, since it is larger than the sum of its proper divisors (901775).

20740273 is an equidigital number, since it uses as much as digits as its factorization.

20740273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901774.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20740273 is about 4554.1489874619. The cubic root of 20740273 is about 274.7502879196.

Adding to 20740273 its reverse (37204702), we get a palindrome (57944975).

The spelling of 20740273 in words is "twenty million, seven hundred forty thousand, two hundred seventy-three".