21363514 has 4 divisors (see below), whose sum is σ = 32045274. Its totient is φ = 10681756.

The previous prime is 21363497. The next prime is 21363593. The reversal of 21363514 is 41536312.

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

It can be written as a sum of positive squares in only one way, i.e., 14250625 + 7112889 = 3775^2 + 2667^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5340877 + ... + 5340880.

Almost surely, 2^21363514 is an apocalyptic number.

21363514 is a deficient number, since it is larger than the sum of its proper divisors (10681760).

21363514 is a wasteful number, since it uses less digits than its factorization.

21363514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10681759.

The product of its digits is 2160, while the sum is 25.

The square root of 21363514 is about 4622.0681518126. The cubic root of 21363514 is about 277.4752362719.

Adding to 21363514 its reverse (41536312), we get a palindrome (62899826).

The spelling of 21363514 in words is "twenty-one million, three hundred sixty-three thousand, five hundred fourteen".