21023014 has 4 divisors (see below), whose sum is σ = 31534524. Its totient is φ = 10511506.

The previous prime is 21023003. The next prime is 21023017. The reversal of 21023014 is 41032012.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21022985 and 21023003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255752 + ... + 5255755.

It is an arithmetic number, because the mean of its divisors is an integer number (7883631).

Almost surely, 2^21023014 is an apocalyptic number.

21023014 is a deficient number, since it is larger than the sum of its proper divisors (10511510).

21023014 is a wasteful number, since it uses less digits than its factorization.

21023014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511509.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21023014 is about 4585.0860406322. The cubic root of 21023014 is about 275.9931647821.

Adding to 21023014 its reverse (41032012), we get a palindrome (62055026).

The spelling of 21023014 in words is "twenty-one million, twenty-three thousand, fourteen".