21204403022 has 8 divisors (see below), whose sum is σ = 34698114072. Its totient is φ = 9638365000.

The previous prime is 21204402997. The next prime is 21204403043. The reversal of 21204403022 is 22030440212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21204402985 and 21204403003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481918229 + ... + 481918272.

It is an arithmetic number, because the mean of its divisors is an integer number (4337264259).

Almost surely, 2^21204403022 is an apocalyptic number.

21204403022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21204403022 is a deficient number, since it is larger than the sum of its proper divisors (13493711050).

21204403022 is a wasteful number, since it uses less digits than its factorization.

21204403022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963836514.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21204403022 its reverse (22030440212), we get a palindrome (43234843234).

The spelling of 21204403022 in words is "twenty-one billion, two hundred four million, four hundred three thousand, twenty-two".