21355541303 has 4 divisors (see below), whose sum is σ = 21566982408. Its totient is φ = 21144100200.

The previous prime is 21355541297. The next prime is 21355541327. The reversal of 21355541303 is 30314555312.

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 21355541303 - 2²⁴ = 21338764087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21355541303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21355541353) 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, 105720401 + ... + 105720602.

It is an arithmetic number, because the mean of its divisors is an integer number (5391745602).

Almost surely, 2^21355541303 is an apocalyptic number.

21355541303 is a deficient number, since it is larger than the sum of its proper divisors (211441105).

21355541303 is a wasteful number, since it uses less digits than its factorization.

21355541303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211441104.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 21355541303 in words is "twenty-one billion, three hundred fifty-five million, five hundred forty-one thousand, three hundred three".