21104706503 has 8 divisors (see below), whose sum is σ = 21186903888. Its totient is φ = 21022665664.

The previous prime is 21104706487. The next prime is 21104706509. The reversal of 21104706503 is 30560740112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21104706503 - 2⁴ = 21104706487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104706509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234725 + ... + 311937.

It is an arithmetic number, because the mean of its divisors is an integer number (2648362986).

Almost surely, 2^21104706503 is an apocalyptic number.

21104706503 is a deficient number, since it is larger than the sum of its proper divisors (82197385).

21104706503 is an equidigital number, since it uses as much as digits as its factorization.

21104706503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78273.

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 21104706503 in words is "twenty-one billion, one hundred four million, seven hundred six thousand, five hundred three".