21014033 has 4 divisors (see below), whose sum is σ = 21123108. Its totient is φ = 20904960.

The previous prime is 21013997. The next prime is 21014041. The reversal of 21014033 is 33041012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9778129 + 11235904 = 3127^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 21014033 - 2¹⁴ = 20997649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21013999 and 21014017.

It is not an unprimeable number, because it can be changed into a prime (21014093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54248 + ... + 54633.

It is an arithmetic number, because the mean of its divisors is an integer number (5280777).

Almost surely, 2^21014033 is an apocalyptic number.

It is an amenable number.

21014033 is a deficient number, since it is larger than the sum of its proper divisors (109075).

21014033 is a wasteful number, since it uses less digits than its factorization.

21014033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109074.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21014033 is about 4584.1065650790. The cubic root of 21014033 is about 275.9538578958.

Adding to 21014033 its reverse (33041012), we get a palindrome (54055045).

The spelling of 21014033 in words is "twenty-one million, fourteen thousand, thirty-three".