21313414 has 8 divisors (see below), whose sum is σ = 32098248. Its totient is φ = 10614000.

The previous prime is 21313379. The next prime is 21313429. The reversal of 21313414 is 41431312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21313391 and 21313400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20727 + ... + 21730.

It is an arithmetic number, because the mean of its divisors is an integer number (4012281).

Almost surely, 2^21313414 is an apocalyptic number.

21313414 is a deficient number, since it is larger than the sum of its proper divisors (10784834).

21313414 is a wasteful number, since it uses less digits than its factorization.

21313414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42710.

The product of its digits is 288, while the sum is 19.

The square root of 21313414 is about 4616.6453188435. The cubic root of 21313414 is about 277.2581622703.

Adding to 21313414 its reverse (41431312), we get a palindrome (62744726).

The spelling of 21313414 in words is "twenty-one million, three hundred thirteen thousand, four hundred fourteen".