21340622 has 4 divisors (see below), whose sum is σ = 32010936. Its totient is φ = 10670310.

The previous prime is 21340603. The next prime is 21340633. The reversal of 21340622 is 22604312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21340594 and 21340603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5335154 + ... + 5335157.

It is an arithmetic number, because the mean of its divisors is an integer number (8002734).

Almost surely, 2^21340622 is an apocalyptic number.

21340622 is a deficient number, since it is larger than the sum of its proper divisors (10670314).

21340622 is a wasteful number, since it uses less digits than its factorization.

21340622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10670313.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 21340622 is about 4619.5911074466. The cubic root of 21340622 is about 277.3760916389.

Adding to 21340622 its reverse (22604312), we get a palindrome (43944934).

The spelling of 21340622 in words is "twenty-one million, three hundred forty thousand, six hundred twenty-two".