21340022 has 16 divisors (see below), whose sum is σ = 35121600. Its totient is φ = 9644040.

The previous prime is 21340019. The next prime is 21340051. The reversal of 21340022 is 22004312.

It is a junction number, because it is equal to n+sod(n) for n = 21339979 and 21340006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229 + ... + 6647.

It is an arithmetic number, because the mean of its divisors is an integer number (2195100).

Almost surely, 2^21340022 is an apocalyptic number.

21340022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21340022 is a deficient number, since it is larger than the sum of its proper divisors (13781578).

21340022 is a wasteful number, since it uses less digits than its factorization.

21340022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5611.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21340022 is about 4619.5261661777. The cubic root of 21340022 is about 277.3734921018.

Adding to 21340022 its reverse (22004312), we get a palindrome (43344334).

It can be divided in two parts, 21 and 340022, that added together give a palindrome (340043).

The spelling of 21340022 in words is "twenty-one million, three hundred forty thousand, twenty-two".