21142314 has 24 divisors (see below), whose sum is σ = 46284420. Its totient is φ = 6974208.

The previous prime is 21142291. The next prime is 21142343. The reversal of 21142314 is 41324112.

It can be written as a sum of positive squares in 2 ways, for example, as 18792225 + 2350089 = 4335^2 + 1533^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4309 + ... + 7800.

Almost surely, 2^21142314 is an apocalyptic number.

21142314 is an abundant number, since it is smaller than the sum of its proper divisors (25142106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21142314 is a wasteful number, since it uses less digits than its factorization.

21142314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12214 (or 12211 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 21142314 is about 4598.0772068333. The cubic root of 21142314 is about 276.5142429064.

Adding to 21142314 its reverse (41324112), we get a palindrome (62466426).

It can be divided in two parts, 2 and 1142314, that added together give a triangular number (1142316 = T₁₅₁₁).

The spelling of 21142314 in words is "twenty-one million, one hundred forty-two thousand, three hundred fourteen".