20616850403 has 4 divisors (see below), whose sum is σ = 20629975368. Its totient is φ = 20603725440.

The previous prime is 20616850399. The next prime is 20616850417. The reversal of 20616850403 is 30405861602.

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 20616850403 - 2² = 20616850399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20616850703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6560126 + ... + 6563267.

It is an arithmetic number, because the mean of its divisors is an integer number (5157493842).

Almost surely, 2^20616850403 is an apocalyptic number.

20616850403 is a deficient number, since it is larger than the sum of its proper divisors (13124965).

20616850403 is a wasteful number, since it uses less digits than its factorization.

20616850403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13124964.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 20616850403 in words is "twenty billion, six hundred sixteen million, eight hundred fifty thousand, four hundred three".