20864446803 has 48 divisors (see below), whose sum is σ = 32653071360. Its totient is φ = 13288359744.

The previous prime is 20864446793. The next prime is 20864446891. The reversal of 20864446803 is 30864446802.

It is not a de Polignac number, because 20864446803 - 2¹⁰ = 20864445779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20864446303) 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 47 ways as a sum of consecutive naturals, for example, 5805175 + ... + 5808767.

It is an arithmetic number, because the mean of its divisors is an integer number (680272320).

Almost surely, 2^20864446803 is an apocalyptic number.

20864446803 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20864446803 is a deficient number, since it is larger than the sum of its proper divisors (11788624557).

20864446803 is a wasteful number, since it uses less digits than its factorization.

20864446803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4670 (or 4658 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

Subtracting 20864446803 from its reverse (30864446802), we obtain a palindrome (9999999999).

The spelling of 20864446803 in words is "twenty billion, eight hundred sixty-four million, four hundred forty-six thousand, eight hundred three".