21341606 has 32 divisors (see below), whose sum is σ = 38174976. Its totient is φ = 8820000.

The previous prime is 21341599. The next prime is 21341611. The reversal of 21341606 is 60614312.

It is a happy number.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19781 + ... + 20831.

It is an arithmetic number, because the mean of its divisors is an integer number (1192968).

Almost surely, 2^21341606 is an apocalyptic number.

21341606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21341606 is a deficient number, since it is larger than the sum of its proper divisors (16833370).

21341606 is a wasteful number, since it uses less digits than its factorization.

21341606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21341606 is about 4619.6976091515. The cubic root of 21341606 is about 277.3803547742.

Adding to 21341606 its reverse (60614312), we get a palindrome (81955918).

The spelling of 21341606 in words is "twenty-one million, three hundred forty-one thousand, six hundred six".