21434182 has 24 divisors (see below), whose sum is σ = 40391568. Its totient is φ = 8350320.

The previous prime is 21434177. The next prime is 21434213. The reversal of 21434182 is 28143412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4633 + ... + 8020.

It is an arithmetic number, because the mean of its divisors is an integer number (1682982).

Almost surely, 2^21434182 is an apocalyptic number.

21434182 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21434182 is a deficient number, since it is larger than the sum of its proper divisors (18957386).

21434182 is a wasteful number, since it uses less digits than its factorization.

21434182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12684 (or 12673 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 21434182 is about 4629.7064701771. The cubic root of 21434182 is about 277.7808513912.

Adding to 21434182 its reverse (28143412), we get a palindrome (49577594).

The spelling of 21434182 in words is "twenty-one million, four hundred thirty-four thousand, one hundred eighty-two".