21034412 has 24 divisors (see below), whose sum is σ = 42223104. Its totient is φ = 8981712.

The previous prime is 21034411. The next prime is 21034417. The reversal of 21034412 is 21443012.

It is not an unprimeable number, because it can be changed into a prime (21034411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7373 + ... + 9819.

It is an arithmetic number, because the mean of its divisors is an integer number (1759296).

Almost surely, 2^21034412 is an apocalyptic number.

It is an amenable number.

21034412 is an abundant number, since it is smaller than the sum of its proper divisors (21188692).

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

21034412 is a wasteful number, since it uses less digits than its factorization.

21034412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765 (or 2763 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21034412 is about 4586.3288150764. The cubic root of 21034412 is about 276.0430339675.

Adding to 21034412 its reverse (21443012), we get a palindrome (42477424).

The spelling of 21034412 in words is "twenty-one million, thirty-four thousand, four hundred twelve".