21416234 has 16 divisors (see below), whose sum is σ = 37464000. Its totient is φ = 9178092.

The previous prime is 21416183. The next prime is 21416281. The reversal of 21416234 is 43261412.

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, 14924 + ... + 16295.

It is an arithmetic number, because the mean of its divisors is an integer number (2341500).

Almost surely, 2^21416234 is an apocalyptic number.

21416234 is a deficient number, since it is larger than the sum of its proper divisors (16047766).

21416234 is an equidigital number, since it uses as much as digits as its factorization.

21416234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31242 (or 31228 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 21416234 is about 4627.7677124074. The cubic root of 21416234 is about 277.7032960959.

Adding to 21416234 its reverse (43261412), we get a palindrome (64677646).

The spelling of 21416234 in words is "twenty-one million, four hundred sixteen thousand, two hundred thirty-four".