21302034 has 32 divisors (see below), whose sum is σ = 46475520. Its totient is φ = 6469632.

The previous prime is 21302027. The next prime is 21302051. The reversal of 21302034 is 43020312.

It is a Curzon 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, 4434 + ... + 7890.

It is an arithmetic number, because the mean of its divisors is an integer number (1452360).

Almost surely, 2^21302034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21302034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23237760).

21302034 is an abundant number, since it is smaller than the sum of its proper divisors (25173486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21302034 is a wasteful number, since it uses less digits than its factorization.

21302034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21302034 is about 4615.4126576071. The cubic root of 21302034 is about 277.2088074428.

Adding to 21302034 its reverse (43020312), we get a palindrome (64322346).

The spelling of 21302034 in words is "twenty-one million, three hundred two thousand, thirty-four".