21034066 has 32 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 9484800.

The previous prime is 21034061. The next prime is 21034067. The reversal of 21034066 is 66043012.

It is not an unprimeable number, because it can be changed into a prime (21034061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110031 + ... + 110221.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^21034066 is an apocalyptic number.

21034066 is a deficient number, since it is larger than the sum of its proper divisors (13802414).

21034066 is a wasteful number, since it uses less digits than its factorization.

21034066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 21034066 is about 4586.2910941195. The cubic root of 21034066 is about 276.0415203936.

Adding to 21034066 its reverse (66043012), we get a palindrome (87077078).

The spelling of 21034066 in words is "twenty-one million, thirty-four thousand, sixty-six".