21043014 has 16 divisors (see below), whose sum is σ = 42880752. Its totient is φ = 6881888.

The previous prime is 21043007. The next prime is 21043019. The reversal of 21043014 is 41034012.

It is a junction number, because it is equal to n+sod(n) for n = 21042984 and 21043002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043019) 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, 32769 + ... + 33404.

It is an arithmetic number, because the mean of its divisors is an integer number (2680047).

Almost surely, 2^21043014 is an apocalyptic number.

21043014 is an abundant number, since it is smaller than the sum of its proper divisors (21837738).

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

21043014 is a wasteful number, since it uses less digits than its factorization.

21043014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66231.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21043014 is about 4587.2665063194. The cubic root of 21043014 is about 276.0806580058.

Adding to 21043014 its reverse (41034012), we get a palindrome (62077026).

The spelling of 21043014 in words is "twenty-one million, forty-three thousand, fourteen".