21203022323 has 8 divisors (see below), whose sum is σ = 24481840992. Its totient is φ = 17986657536.

The previous prime is 21203022299. The next prime is 21203022341. The reversal of 21203022323 is 32322030212.

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 21203022323 - 2²⁴ = 21186245107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21203022295 and 21203022304.

It is not an unprimeable number, because it can be changed into a prime (21203022823) 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, 15612740 + ... + 15614097.

It is an arithmetic number, because the mean of its divisors is an integer number (3060230124).

Almost surely, 2^21203022323 is an apocalyptic number.

21203022323 is a deficient number, since it is larger than the sum of its proper divisors (3278818669).

21203022323 is an equidigital number, since it uses as much as digits as its factorization.

21203022323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31226941.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21203022323 its reverse (32322030212), we get a palindrome (53525052535).

The spelling of 21203022323 in words is "twenty-one billion, two hundred three million, twenty-two thousand, three hundred twenty-three".