21403432223 has 8 divisors (see below), whose sum is σ = 22169639280. Its totient is φ = 20639102400.

The previous prime is 21403432201. The next prime is 21403432231. The reversal of 21403432223 is 32223430412.

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 21403432223 - 2¹⁶ = 21403366687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21403432192 and 21403432201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403432273) 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, 446078 + ... + 491723.

It is an arithmetic number, because the mean of its divisors is an integer number (2771204910).

Almost surely, 2^21403432223 is an apocalyptic number.

21403432223 is a deficient number, since it is larger than the sum of its proper divisors (766207057).

21403432223 is an equidigital number, since it uses as much as digits as its factorization.

21403432223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938617.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21403432223 its reverse (32223430412), we get a palindrome (53626862635).

The spelling of 21403432223 in words is "twenty-one billion, four hundred three million, four hundred thirty-two thousand, two hundred twenty-three".