20604535312 has 10 divisors (see below), whose sum is σ = 39921287198. Its totient is φ = 10302267648.

The previous prime is 20604535297. The next prime is 20604535319. The reversal of 20604535312 is 21353540602.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19155667216 + 1448868096 = 138404^2 + 38064^2 .

It is not an unprimeable number, because it can be changed into a prime (20604535319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643891713 + ... + 643891744.

Almost surely, 2^20604535312 is an apocalyptic number.

It is an amenable number.

20604535312 is a deficient number, since it is larger than the sum of its proper divisors (19316751886).

20604535312 is a wasteful number, since it uses less digits than its factorization.

20604535312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287783465 (or 1287783459 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 20604535312 in words is "twenty billion, six hundred four million, five hundred thirty-five thousand, three hundred twelve".