21460043 has 4 divisors (see below), whose sum is σ = 23410968. Its totient is φ = 19509120.

The previous prime is 21460007. The next prime is 21460057. The reversal of 21460043 is 34006412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21460043 - 2⁶ = 21459979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21459997 and 21460024.

It is not an unprimeable number, because it can be changed into a prime (21460003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975446 + ... + 975467.

It is an arithmetic number, because the mean of its divisors is an integer number (5852742).

Almost surely, 2^21460043 is an apocalyptic number.

21460043 is a deficient number, since it is larger than the sum of its proper divisors (1950925).

21460043 is a wasteful number, since it uses less digits than its factorization.

21460043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950924.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 21460043 is about 4632.4985698864. The cubic root of 21460043 is about 277.8925235389.

Adding to 21460043 its reverse (34006412), we get a palindrome (55466455).

It can be divided in two parts, 21 and 460043, that added together give a palindrome (460064).

The spelling of 21460043 in words is "twenty-one million, four hundred sixty thousand, forty-three".