20704621803 has 12 divisors (see below), whose sum is σ = 29135591208. Its totient is φ = 13076602560.

The previous prime is 20704621739. The next prime is 20704621871. The reversal of 20704621803 is 30812640702.

It is not a de Polignac number, because 20704621803 - 2⁶ = 20704621739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20704621103) 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 11 ways as a sum of consecutive naturals, for example, 9557838 + ... + 9560003.

It is an arithmetic number, because the mean of its divisors is an integer number (2427965934).

Almost surely, 2^20704621803 is an apocalyptic number.

20704621803 is a deficient number, since it is larger than the sum of its proper divisors (8430969405).

20704621803 is a wasteful number, since it uses less digits than its factorization.

20704621803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19117882 (or 19117863 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 20704621803 in words is "twenty billion, seven hundred four million, six hundred twenty-one thousand, eight hundred three".