21034030 has 8 divisors (see below), whose sum is σ = 37861272. Its totient is φ = 8413608.

The previous prime is 21034003. The next prime is 21034033. The reversal of 21034030 is 3043012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21034030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034033) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1051692 + ... + 1051711.

It is an arithmetic number, because the mean of its divisors is an integer number (4732659).

Almost surely, 2^21034030 is an apocalyptic number.

21034030 is a deficient number, since it is larger than the sum of its proper divisors (16827242).

21034030 is a wasteful number, since it uses less digits than its factorization.

21034030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103410.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21034030 is about 4586.2871693779. The cubic root of 21034030 is about 276.0413629109.

Adding to 21034030 its reverse (3043012), we get a palindrome (24077042).

The spelling of 21034030 in words is "twenty-one million, thirty-four thousand, thirty".