21041415203 has 4 divisors (see below), whose sum is σ = 21121420848. Its totient is φ = 20961409560.

The previous prime is 21041415173. The next prime is 21041415223. The reversal of 21041415203 is 30251414012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21041415203 - 2⁶ = 21041415139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21041415223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40002428 + ... + 40002953.

It is an arithmetic number, because the mean of its divisors is an integer number (5280355212).

Almost surely, 2^21041415203 is an apocalyptic number.

21041415203 is a deficient number, since it is larger than the sum of its proper divisors (80005645).

21041415203 is an equidigital number, since it uses as much as digits as its factorization.

21041415203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80005644.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21041415203 its reverse (30251414012), we get a palindrome (51292829215).

The spelling of 21041415203 in words is "twenty-one billion, forty-one million, four hundred fifteen thousand, two hundred three".