21814030 has 32 divisors (see below), whose sum is σ = 45074880. Its totient is φ = 7445760.

The previous prime is 21814021. The next prime is 21814069. The reversal of 21814030 is 3041812.

It is a junction number, because it is equal to n+sod(n) for n = 21813989 and 21814007.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19116 + ... + 20224.

It is an arithmetic number, because the mean of its divisors is an integer number (1408590).

Almost surely, 2^21814030 is an apocalyptic number.

21814030 is an abundant number, since it is smaller than the sum of its proper divisors (23260850).

21814030 is a wasteful number, since it uses less digits than its factorization.

21814030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21814030 is about 4670.5492182398. The cubic root of 21814030 is about 279.4121595910.

Adding to 21814030 its reverse (3041812), we get a palindrome (24855842).

The spelling of 21814030 in words is "twenty-one million, eight hundred fourteen thousand, thirty".