20600787553 has 8 divisors (see below), whose sum is σ = 21110803560. Its totient is φ = 20091131520.

The previous prime is 20600787551. The next prime is 20600787587. The reversal of 20600787553 is 35578700602.

It can be written as a sum of positive squares in 4 ways, for example, as 1275061264 + 19325726289 = 35708^2 + 139017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20600787553 - 2¹ = 20600787551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20600787551) by changing a digit.

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, 27763 + ... + 204871.

It is an arithmetic number, because the mean of its divisors is an integer number (2638850445).

Almost surely, 2^20600787553 is an apocalyptic number.

It is an amenable number.

20600787553 is a deficient number, since it is larger than the sum of its proper divisors (510016007).

20600787553 is a wasteful number, since it uses less digits than its factorization.

20600787553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179987.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 20600787553 in words is "twenty billion, six hundred million, seven hundred eighty-seven thousand, five hundred fifty-three".