21010622 has 16 divisors (see below), whose sum is σ = 32841600. Its totient is φ = 10069920.

The previous prime is 21010609. The next prime is 21010663. The reversal of 21010622 is 22601012.

It is a junction number, because it is equal to n+sod(n) for n = 21010597 and 21010606.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 5204 + ... + 8312.

It is an arithmetic number, because the mean of its divisors is an integer number (2052600).

Almost surely, 2^21010622 is an apocalyptic number.

21010622 is a deficient number, since it is larger than the sum of its proper divisors (11830978).

21010622 is a wasteful number, since it uses less digits than its factorization.

21010622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21010622 is about 4583.7345036553. The cubic root of 21010622 is about 275.9389261350.

Adding to 21010622 its reverse (22601012), we get a palindrome (43611634).

The spelling of 21010622 in words is "twenty-one million, ten thousand, six hundred twenty-two".