21050410503 has 8 divisors (see below), whose sum is σ = 28112706288. Its totient is φ = 14010860864.

The previous prime is 21050410487. The next prime is 21050410529. The reversal of 21050410503 is 30501405012.

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 21050410503 - 2⁴ = 21050410487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21050410503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21050410553) 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, 5684376 + ... + 5688077.

It is an arithmetic number, because the mean of its divisors is an integer number (3514088286).

Almost surely, 2^21050410503 is an apocalyptic number.

21050410503 is a deficient number, since it is larger than the sum of its proper divisors (7062295785).

21050410503 is a wasteful number, since it uses less digits than its factorization.

21050410503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11373073.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 21050410503 its reverse (30501405012), we get a palindrome (51551815515).

The spelling of 21050410503 in words is "twenty-one billion, fifty million, four hundred ten thousand, five hundred three".