21734834 has 16 divisors (see below), whose sum is σ = 35652960. Its totient is φ = 9855360.

The previous prime is 21734831. The next prime is 21734837. The reversal of 21734834 is 43843712.

It is an interprime number because it is at equal distance from previous prime (21734831) and next prime (21734837).

It is a self number, because there is not a number n which added to its sum of digits gives 21734834.

It is not an unprimeable number, because it can be changed into a prime (21734831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10562 + ... + 12450.

It is an arithmetic number, because the mean of its divisors is an integer number (2228310).

Almost surely, 2^21734834 is an apocalyptic number.

21734834 is a deficient number, since it is larger than the sum of its proper divisors (13918126).

21734834 is a wasteful number, since it uses less digits than its factorization.

21734834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425.

The product of its digits is 16128, while the sum is 32.

The square root of 21734834 is about 4662.0632771338. The cubic root of 21734834 is about 279.0736135795.

It can be divided in two parts, 2173 and 4834, that added together give a palindrome (7007).

The spelling of 21734834 in words is "twenty-one million, seven hundred thirty-four thousand, eight hundred thirty-four".