20280040206 has 32 divisors (see below), whose sum is σ = 41735295360. Its totient is φ = 6565901664.

The previous prime is 20280040169. The next prime is 20280040259. The reversal of 20280040206 is 60204008202.

It is a super-2 number, since 2×20280040206² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173385 + ... + 265748.

It is an arithmetic number, because the mean of its divisors is an integer number (1304227980).

Almost surely, 2^20280040206 is an apocalyptic number.

20280040206 is an abundant number, since it is smaller than the sum of its proper divisors (21455255154).

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

20280040206 is a wasteful number, since it uses less digits than its factorization.

20280040206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439360.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 20280040206 its reverse (60204008202), we get a palindrome (80484048408).

The spelling of 20280040206 in words is "twenty billion, two hundred eighty million, forty thousand, two hundred six".