21031314 has 8 divisors (see below), whose sum is σ = 42062640. Its totient is φ = 7010436.

The previous prime is 21031313. The next prime is 21031333. The reversal of 21031314 is 41313012.

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

21031314 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21031293 and 21031302.

It is not an unprimeable number, because it can be changed into a prime (21031313) 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, 1752604 + ... + 1752615.

It is an arithmetic number, because the mean of its divisors is an integer number (5257830).

Almost surely, 2^21031314 is an apocalyptic number.

21031314 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21031314 is a wasteful number, since it uses less digits than its factorization.

21031314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3505224.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21031314 is about 4585.9910597383. The cubic root of 21031314 is about 276.0294812029.

Adding to 21031314 its reverse (41313012), we get a palindrome (62344326).

The spelling of 21031314 in words is "twenty-one million, thirty-one thousand, three hundred fourteen".