21302334 has 24 divisors (see below), whose sum is σ = 46244952. Its totient is φ = 7086960.

The previous prime is 21302321. The next prime is 21302371. The reversal of 21302334 is 43320312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 13149 + ... + 14679.

It is an arithmetic number, because the mean of its divisors is an integer number (1926873).

Almost surely, 2^21302334 is an apocalyptic number.

21302334 is an abundant number, since it is smaller than the sum of its proper divisors (24942618).

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

21302334 is a wasteful number, since it uses less digits than its factorization.

21302334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 21302334 is about 4615.4451572952. The cubic root of 21302334 is about 277.2101087622.

Adding to 21302334 its reverse (43320312), we get a palindrome (64622646).

The spelling of 21302334 in words is "twenty-one million, three hundred two thousand, three hundred thirty-four".