21004041422 has 32 divisors (see below), whose sum is σ = 38824084992. Its totient is φ = 8299135584.

The previous prime is 21004041403. The next prime is 21004041479. The reversal of 21004041422 is 22414040012.

It is a junction number, because it is equal to n+sod(n) for n = 21004041394 and 21004041403.

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 15 ways as a sum of consecutive naturals, for example, 79673 + ... + 219899.

It is an arithmetic number, because the mean of its divisors is an integer number (1213252656).

Almost surely, 2^21004041422 is an apocalyptic number.

21004041422 is a deficient number, since it is larger than the sum of its proper divisors (17820043570).

21004041422 is a wasteful number, since it uses less digits than its factorization.

21004041422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141072.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21004041422 its reverse (22414040012), we get a palindrome (43418081434).

The spelling of 21004041422 in words is "twenty-one billion, four million, forty-one thousand, four hundred twenty-two".