20503133777 has 32 divisors (see below), whose sum is σ = 25422336000. Its totient is φ = 16148075328.

The previous prime is 20503133711. The next prime is 20503133779. The reversal of 20503133777 is 77733130502.

It is not a de Polignac number, because 20503133777 - 2¹⁰ = 20503132753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20503133777.

It is not an unprimeable number, because it can be changed into a prime (20503133779) 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 31 ways as a sum of consecutive naturals, for example, 918098 + ... + 940164.

It is an arithmetic number, because the mean of its divisors is an integer number (794448000).

Almost surely, 2^20503133777 is an apocalyptic number.

It is an amenable number.

20503133777 is a deficient number, since it is larger than the sum of its proper divisors (4919202223).

20503133777 is a wasteful number, since it uses less digits than its factorization.

20503133777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22325.

The product of its (nonzero) digits is 92610, while the sum is 38.

The spelling of 20503133777 in words is "twenty billion, five hundred three million, one hundred thirty-three thousand, seven hundred seventy-seven".