21241435503 has 8 divisors (see below), whose sum is σ = 28323617328. Its totient is φ = 14160105344.

The previous prime is 21241435499. The next prime is 21241435577. The reversal of 21241435503 is 30553414212.

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 21241435503 - 2² = 21241435499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241435003) 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 7 ways as a sum of consecutive naturals, for example, 152250 + ... + 256247.

It is an arithmetic number, because the mean of its divisors is an integer number (3540452166).

Almost surely, 2^21241435503 is an apocalyptic number.

21241435503 is a deficient number, since it is larger than the sum of its proper divisors (7082181825).

21241435503 is a wasteful number, since it uses less digits than its factorization.

21241435503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425833.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21241435503 its reverse (30553414212), we get a palindrome (51794849715).

The spelling of 21241435503 in words is "twenty-one billion, two hundred forty-one million, four hundred thirty-five thousand, five hundred three".