21023034 has 8 divisors (see below), whose sum is σ = 42046080. Its totient is φ = 7007676.

The previous prime is 21023017. The next prime is 21023047. The reversal of 21023034 is 43032012.

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

21023034 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1751914 + ... + 1751925.

It is an arithmetic number, because the mean of its divisors is an integer number (5255760).

Almost surely, 2^21023034 is an apocalyptic number.

21023034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21023034 is a wasteful number, since it uses less digits than its factorization.

21023034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503844.

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

The square root of 21023034 is about 4585.0882216158. The cubic root of 21023034 is about 275.9932523030.

Adding to 21023034 its reverse (43032012), we get a palindrome (64055046).

The spelling of 21023034 in words is "twenty-one million, twenty-three thousand, thirty-four".