20616432650503 has 4 divisors (see below), whose sum is σ = 21327344121240. Its totient is φ = 19905521179768.

The previous prime is 20616432650497. The next prime is 20616432650543. The reversal of 20616432650503 is 30505623461602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20616432650503 - 2⁹ = 20616432649991 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 20616432650503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616432650543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355455735325 + ... + 355455735382.

It is an arithmetic number, because the mean of its divisors is an integer number (5331836030310).

Almost surely, 2^{20616432650503} is an apocalyptic number.

20616432650503 is a deficient number, since it is larger than the sum of its proper divisors (710911470737).

20616432650503 is an equidigital number, since it uses as much as digits as its factorization.

20616432650503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710911470736.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 20616432650503 in words is "twenty trillion, six hundred sixteen billion, four hundred thirty-two million, six hundred fifty thousand, five hundred three".