21040622 has 8 divisors (see below), whose sum is σ = 31580472. Its totient is φ = 10513800.

The previous prime is 21040601. The next prime is 21040627. The reversal of 21040622 is 22604012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21040622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21040627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4172 + ... + 7712.

It is an arithmetic number, because the mean of its divisors is an integer number (3947559).

Almost surely, 2^21040622 is an apocalyptic number.

21040622 is a deficient number, since it is larger than the sum of its proper divisors (10539850).

21040622 is a wasteful number, since it uses less digits than its factorization.

21040622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6514.

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

The square root of 21040622 is about 4587.0057771928. The cubic root of 21040622 is about 276.0701967357.

Adding to 21040622 its reverse (22604012), we get a palindrome (43644634).

The spelling of 21040622 in words is "twenty-one million, forty thousand, six hundred twenty-two".