21060422 has 4 divisors (see below), whose sum is σ = 31590636. Its totient is φ = 10530210.

The previous prime is 21060421. The next prime is 21060449. The reversal of 21060422 is 22406012.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21060422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5265104 + ... + 5265107.

It is an arithmetic number, because the mean of its divisors is an integer number (7897659).

Almost surely, 2^21060422 is an apocalyptic number.

21060422 is a deficient number, since it is larger than the sum of its proper divisors (10530214).

21060422 is a wasteful number, since it uses less digits than its factorization.

21060422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530213.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21060422 is about 4589.1635403415. The cubic root of 21060422 is about 276.1567669927.

Adding to 21060422 its reverse (22406012), we get a palindrome (43466434).

The spelling of 21060422 in words is "twenty-one million, sixty thousand, four hundred twenty-two".