21308714 has 8 divisors (see below), whose sum is σ = 36529248. Its totient is φ = 9132300.

The previous prime is 21308711. The next prime is 21308723. The reversal of 21308714 is 41780312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21308714² = 908122584667592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21308711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761012 + ... + 761039.

It is an arithmetic number, because the mean of its divisors is an integer number (4566156).

Almost surely, 2^21308714 is an apocalyptic number.

21308714 is a deficient number, since it is larger than the sum of its proper divisors (15220534).

21308714 is a wasteful number, since it uses less digits than its factorization.

21308714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522060.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21308714 is about 4616.1362631534. The cubic root of 21308714 is about 277.2377805964.

It can be divided in two parts, 21308 and 714, that added together give a palindrome (22022).

The spelling of 21308714 in words is "twenty-one million, three hundred eight thousand, seven hundred fourteen".