39506021218 has 16 divisors (see below), whose sum is σ = 59816849400. Its totient is φ = 19567783296.

The previous prime is 39506021209. The next prime is 39506021267. The reversal of 39506021218 is 81212060593.

It can be written as a sum of positive squares in 4 ways, for example, as 25061106249 + 14444914969 = 158307^2 + 120187^2 .

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 7 ways as a sum of consecutive naturals, for example, 66555 + ... + 288862.

Almost surely, 2^39506021218 is an apocalyptic number.

39506021218 is a deficient number, since it is larger than the sum of its proper divisors (20310828182).

39506021218 is a wasteful number, since it uses less digits than its factorization.

39506021218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355941.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 39506021218 in words is "thirty-nine billion, five hundred six million, twenty-one thousand, two hundred eighteen".