20740206 has 16 divisors (see below), whose sum is σ = 41981184. Its totient is φ = 6829944.

The previous prime is 20740201. The next prime is 20740217. The reversal of 20740206 is 60204702.

It is a happy number.

It is a super-2 number, since 2×20740206² = 860312289844872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20326 + ... + 21321.

It is an arithmetic number, because the mean of its divisors is an integer number (2623824).

Almost surely, 2^20740206 is an apocalyptic number.

20740206 is an abundant number, since it is smaller than the sum of its proper divisors (21240978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20740206 is a wasteful number, since it uses less digits than its factorization.

20740206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41735.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20740206 is about 4554.1416315262. The cubic root of 20740206 is about 274.7499920655.

Adding to 20740206 its reverse (60204702), we get a palindrome (80944908).

The spelling of 20740206 in words is "twenty million, seven hundred forty thousand, two hundred six".