21354514 has 16 divisors (see below), whose sum is σ = 32866200. Its totient is φ = 10402560.

The previous prime is 21354451. The next prime is 21354551. The reversal of 21354514 is 41545312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4338889 + 17015625 = 2083^2 + 4125^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13012 + ... + 14560.

Almost surely, 2^21354514 is an apocalyptic number.

21354514 is a deficient number, since it is larger than the sum of its proper divisors (11511686).

21354514 is a wasteful number, since it uses less digits than its factorization.

21354514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725.

The product of its digits is 2400, while the sum is 25.

The square root of 21354514 is about 4621.0944591081. The cubic root of 21354514 is about 277.4362659681.

Adding to 21354514 its reverse (41545312), we get a palindrome (62899826).

The spelling of 21354514 in words is "twenty-one million, three hundred fifty-four thousand, five hundred fourteen".