21796573503 has 16 divisors (see below), whose sum is σ = 29732265216. Its totient is φ = 14199588480.

The previous prime is 21796573481. The next prime is 21796573517. The reversal of 21796573503 is 30537569712.

It is not a de Polignac number, because 21796573503 - 2⁹ = 21796572991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796573543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428725 + ... + 476862.

It is an arithmetic number, because the mean of its divisors is an integer number (1858266576).

Almost surely, 2^21796573503 is an apocalyptic number.

21796573503 is a deficient number, since it is larger than the sum of its proper divisors (7935691713).

21796573503 is a wasteful number, since it uses less digits than its factorization.

21796573503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905774.

The product of its (nonzero) digits is 1190700, while the sum is 48.

The spelling of 21796573503 in words is "twenty-one billion, seven hundred ninety-six million, five hundred seventy-three thousand, five hundred three".