21403202223 has 48 divisors (see below), whose sum is σ = 31433690400. Its totient is φ = 12945733632.

The previous prime is 21403202209. The next prime is 21403202231. The reversal of 21403202223 is 32220230412.

It is not a de Polignac number, because 21403202223 - 2¹⁰ = 21403201199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21403202223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403202273) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12916011 + ... + 12917667.

It is an arithmetic number, because the mean of its divisors is an integer number (654868550).

Almost surely, 2^21403202223 is an apocalyptic number.

21403202223 is a deficient number, since it is larger than the sum of its proper divisors (10030488177).

21403202223 is a wasteful number, since it uses less digits than its factorization.

21403202223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108 (or 2095 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21403202223 its reverse (32220230412), we get a palindrome (53623432635).

The spelling of 21403202223 in words is "twenty-one billion, four hundred three million, two hundred two thousand, two hundred twenty-three".