21203324223 has 8 divisors (see below), whose sum is σ = 28274706048. Its totient is φ = 14133745944.

The previous prime is 21203324183. The next prime is 21203324237. The reversal of 21203324223 is 32242330212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21203324223 - 2⁶ = 21203324159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21203324193 and 21203324202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203324423) 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, 423211 + ... + 470652.

It is an arithmetic number, because the mean of its divisors is an integer number (3534338256).

Almost surely, 2^21203324223 is an apocalyptic number.

21203324223 is a deficient number, since it is larger than the sum of its proper divisors (7071381825).

21203324223 is an equidigital number, since it uses as much as digits as its factorization.

21203324223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901773.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21203324223 its reverse (32242330212), we get a palindrome (53445654435).

The spelling of 21203324223 in words is "twenty-one billion, two hundred three million, three hundred twenty-four thousand, two hundred twenty-three".