40120203205 has 4 divisors (see below), whose sum is σ = 48144243852. Its totient is φ = 32096162560.

The previous prime is 40120203191. The next prime is 40120203223. The reversal of 40120203205 is 50230202104.

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 23440222404 + 16679980801 = 153102^2 + 129151^2 .

It is not a de Polignac number, because 40120203205 - 2²¹ = 40118106053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4012020316 + ... + 4012020325.

It is an arithmetic number, because the mean of its divisors is an integer number (12036060963).

Almost surely, 2^40120203205 is an apocalyptic number.

It is an amenable number.

40120203205 is a deficient number, since it is larger than the sum of its proper divisors (8024040647).

40120203205 is an equidigital number, since it uses as much as digits as its factorization.

40120203205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8024040646.

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 40120203205 its reverse (50230202104), we get a palindrome (90350405309).

The spelling of 40120203205 in words is "forty billion, one hundred twenty million, two hundred three thousand, two hundred five".