21530114 has 4 divisors (see below), whose sum is σ = 32295174. Its totient is φ = 10765056.

The previous prime is 21530099. The next prime is 21530123. The reversal of 21530114 is 41103512.

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., 14691889 + 6838225 = 3833^2 + 2615^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21530092 and 21530101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5382527 + ... + 5382530.

Almost surely, 2^21530114 is an apocalyptic number.

21530114 is a deficient number, since it is larger than the sum of its proper divisors (10765060).

21530114 is a wasteful number, since it uses less digits than its factorization.

21530114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10765059.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21530114 is about 4640.0553876005. The cubic root of 21530114 is about 278.1946517302.

Adding to 21530114 its reverse (41103512), we get a palindrome (62633626).

The spelling of 21530114 in words is "twenty-one million, five hundred thirty thousand, one hundred fourteen".