21040423322 has 8 divisors (see below), whose sum is σ = 32932836576. Its totient is φ = 10062811132.

The previous prime is 21040423309. The next prime is 21040423333. The reversal of 21040423322 is 22332404012.

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

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228700208 + ... + 228700299.

It is an arithmetic number, because the mean of its divisors is an integer number (4116604572).

Almost surely, 2^21040423322 is an apocalyptic number.

21040423322 is a deficient number, since it is larger than the sum of its proper divisors (11892413254).

21040423322 is a wasteful number, since it uses less digits than its factorization.

21040423322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457400532.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21040423322 its reverse (22332404012), we get a palindrome (43372827334).

The spelling of 21040423322 in words is "twenty-one billion, forty million, four hundred twenty-three thousand, three hundred twenty-two".